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18 tháng 2 2020

I. Điền một giới từ vào chỗ trống

1.Water consists of hydrogen and oxygen

2.She lived independently without her parents

3.Santa Claus is based on the description of Saint Nicholasin the poem

4.we give each other presents on Christmas

5.Don't sit on the floor

6.I'm going away at the end of January

7.I met Tom on the street yesterday

8. Do you think we'll find a solution for this problem?

9.Have you ever read any books of Mark Twain?

10.were you disappointed at your examination results ?

11.She is scared of going out alone

12.I'm not ashamed of what I did

13.My sister won't have dinner at 11.30 p.m

14.Your writing is similar to mine

15.Ann wasn't keen on going out in the rain

Điền giới từ 1. Today's exams have tired me............. So I think I will turn............ early tonight 2. I know her................... sight, but not to speak.............. 3. Everyone was afraid of going out............ the dark until the robberies and had died.................... 4. I don't approve...................... your walking .................. the stress alone 5. Does animal belong................ you.................. any chance? 6. Don't be.........................
Đọc tiếp

Điền giới từ

1. Today's exams have tired me............. So I think I will turn............ early tonight

2. I know her................... sight, but not to speak..............

3. Everyone was afraid of going out............ the dark until the robberies and had died....................

4. I don't approve...................... your walking .................. the stress alone

5. Does animal belong................ you.................. any chance?

6. Don't be...................... such a hurry. I can't keep ................

7. I have nothing ............... common.............. him. So we have put an end ............ our friendship ................ once and................all

8. The bag is full................. books and I can't put................ the clothes

9. " There is nothing left in the cupboard" they said............... each other................. despair

10. She was qiuck................. finding out things but she was to sick.............. doing things for us

11. His story was ................... no interest ............ us

12. We wanted them to describe their trip.................... the beginning .............. the end

1
7 tháng 10 2018

1. Today's exams have tired me....of......... So I think I will turn........off.... early tonight

2. I know her.............by...... sight, but not to speak.......to.......

3. Everyone was afraid of going out.......in..... the dark until the robberies and had died........of............

4. I don't approve...........of........... your walking ........on.......... the stress alone

5. Does animal belong........to........ you.........by......... any chance?

8. The bag is full......of........... books and I can't put......on.......... the clothes

12. We wanted them to describe their trip........at............ the beginning .....of......... the end

VIII. Fill in the blank with one suitable preposition or adverb. have a cup of tea. 1. You look tired. Sit_________and have a cup of tea 2. I'm looking_______ yesterday's newspaper. Did you throw it _______? 3. Could I try_________these shoes, please? Size nine. 4. Turn _______the music. It's too loud! 5. Don't forget to turn__________ the lights when you come to bed. 6. I used to smoke, but I gave______last year. 7. Just carry________with what you were doing 8. Pick _______ your...
Đọc tiếp

VIII. Fill in the blank with one suitable preposition or adverb. have a cup of tea.

1. You look tired. Sit_________and have a cup of tea

2. I'm looking_______ yesterday's newspaper. Did you throw it _______?

3. Could I try_________these shoes, please? Size nine.

4. Turn _______the music. It's too loud!

5. Don't forget to turn__________ the lights when you come to bed.

6. I used to smoke, but I gave______last year.

7. Just carry________with what you were doing

8. Pick _______ your litter! Don't drop it on the street!

9. Don't worry about the baby. I'll look________her while you're out.

10. I'm looking________ to meeting her very much.

11. Who do you take_______the most, your father or your mother?

12. The test is about to begin. Please put_______all of your books and notebooks

13. 'How do you spell this word?' ' i'm not sure. You'd better louk it_______in your dictionary

15. Tho show was cailed___________because of the rain

2
20 tháng 10 2018

VIII. Fill in the blank with one suitable preposition or adverb. have a cup of tea.

1. You look tired. Sit___down______and have a cup of tea

2. I'm looking____for___ yesterday's newspaper. Did you throw it ___away____?

3. Could I try_____on____these shoes, please? Size nine.

4. Turn ____off___the music. It's too loud!

5. Don't forget to turn______off____ the lights when you come to bed.

6. I used to smoke, but I gave___up___last year.

7. Just carry____on____with what you were doing

8. Pick ___up____ your litter! Don't drop it on the street!

9. Don't worry about the baby. I'll look____after____her while you're out.

10. I'm looking___forward_____ to meeting her very much.

12. The test is about to begin. Please put___out____all of your books and notebooks

13. 'How do you spell this word?' ' i'm not sure. You'd better louk it____up___in your dictionary

20 tháng 10 2018

VIII. Fill in the blank with one suitable preposition or adverb. have a cup of tea.

1. You look tired. Sit_____down____and have a cup of tea

2. I'm looking____for___ yesterday's newspaper. Did you throw it ___away____?

3. Could I try_____on____these shoes, please? Size nine.

4. Turn __down____the music. It's too loud!

5. Don't forget to turn_____off_____ the lights when you come to bed.

6. I used to smoke, but I gave__up____last year.

7. Just carry____out____with what you were doing

8. Pick ___up____ your litter! Don't drop it on the street!

9. Don't worry about the baby. I'll look_____after___her while you're out.

10. I'm looking____forward____ to meeting her very much.

1. Study hard or you will fail the exam. a. If you didn't study hard, you wouldn't fail the exam b. If you study harder, you won't pass the exam. c. If you don't study hard, you will fail the exan. d. If you studied hard, you will pass the exam. 2.'I'm going on the Internet now' Minh said. a. Minh said he is going on the Internet now. b. Minh said I am going on the Internet now. c. Minh said us he was going in the Internet ther. d. Minh told us he was going on the Internet then. 3....
Đọc tiếp
1. Study hard or you will fail the exam. a. If you didn't study hard, you wouldn't fail the exam b. If you study harder, you won't pass the exam. c. If you don't study hard, you will fail the exan. d. If you studied hard, you will pass the exam. 2.'I'm going on the Internet now' Minh said. a. Minh said he is going on the Internet now. b. Minh said I am going on the Internet now. c. Minh said us he was going in the Internet ther. d. Minh told us he was going on the Internet then. 3. My daughter is looking forward to seeing her friends again. a. My daughter is expecting to see her friends again. b. My daughter feels bored because she is going to see hei friends. c. My daughter doesn't want to see her friends again. d. My daughter always like seeing her friends. 4. Why don't you use a password to protect your files? An said to me. a. An advised me to usc a password to protect your files b. An suggested me using a password to protect my files c. An encouraged me to use a password to protect my files d. An asked me why I didn't use a password to protect my files. 5. You haven't seen Mary today, have you? a. You haven't seen Mary so far b. Have you ever met Mary before? c. Have you seen Mary today by any chance? d. Are you going to see Mary today? B. Write the second sentence so that it has a similar meaning to the first. 1. Your parents' house is still in Nha Trang, isn't it? Your parents still___________ 2. My brother spends thrce hours surfing the Net every night. It takes_________ 3. She asked Joanna how she thought of her new dress? . 'How__________ 4.'Do you like watching ?' He said to me. He asked___________ 5. I was surprised I passed the exam. I didn't expect__________ 6. Do you find it difficult to understand him'? Do you have____________ 7. It's a pity I don't know many people here. I wish____________ 8. 'Laura! Don't touch the electric wires!" Mike warned____________ 9. My mother never allows me to go out alone at night. My mother never lets___________ 10. People should use bicycles for short journeys. Bicycles___________
2
15 tháng 9 2018

1. Study hard or you will fail the exam.

a. If you didn't study hard, you wouldn't fail the exam

b. If you study harder, you won't pass the exam.

c. If you don't study hard, you will fail the exan.

d. If you studied hard, you will pass the exam.

2.'I'm going on the Internet now' Minh said.

a. Minh said he is going on the Internet now.

b. Minh said I am going on the Internet now.

c. Minh said us he was going in the Internet ther.

d. Minh told us he was going on the Internet then.

3. My daughter is looking forward to seeing her friends again.

a. My daughter is expecting to see her friends again.

b. My daughter feels bored because she is going to see hei friends.

c. My daughter doesn't want to see her friends again.

d. My daughter always like seeing her friends.

4. Why don't you use a password to protect your files? An said to me.

a. An advised me to usc a password to protect your files

b. An suggested me using a password to protect my files

c. An encouraged me to use a password to protect my files

d. An asked me why I didn't use a password to protect my files.

5. You haven't seen Mary today, have you?

a. You haven't seen Mary so far

b. Have you ever met Mary before?

c. Have you seen Mary today by any chance?

d. Are you going to see Mary today?

I.Rewrite: 1. she often wore jeans when she was young. =>She used........................................ 2. he is not a poor man any more. => he used.............................................. 3. Nga enjoys listening to traditional stories. =>Nga is.................................... 4. she doesn't have money to buy this car. (rich) => she.............................................. 5. you should not stay up so late in the evening. =>you had............................ 6. my...
Đọc tiếp

I.Rewrite:

1. she often wore jeans when she was young.

=>She used........................................

2. he is not a poor man any more.

=> he used..............................................

3. Nga enjoys listening to traditional stories.

=>Nga is....................................

4. she doesn't have money to buy this car. (rich)

=> she..............................................

5. you should not stay up so late in the evening.

=>you had............................

6. my parents didn't let me go out in the evening.

=>my parents didn't allow........................................................

7. Sarah needs to improve her English.

=>Sarah's English.............................................

8. we are going to teach our students some new English words tomoow.

=> some new english words..........................................

9. This hose is considered not to be as expensive as many people think.

=>they...............................................

10. ''what did you do yesterday?'' her friend asked.

=>her friend wanted to know.......................................................

II.Give the correct form or tense of verbs.

1. Jane saw her old friend while she (cross).....................the stress.

2. He had his father (decorate)....................his Christmas card yesterday.

3. I saw him (water).......................the flowers in the garden.

4. Paul is said (be)..............the brightest student in the class.

5. The poem which (write).....................by Clement Clarke Moore, become popular in the USA.

6.When he realized I (look).................at him, he (turn).......................away.

7. It was late, so we decided.................(take)a taxi home.

8. We were hungry, so I suggested......................(have)dinner early.

9. When I'm tired, I don't enjoy.................(question)by other people.

6
19 tháng 8 2018

Câu 10 phải lùi thì Bé ơi :V

19 tháng 8 2018

I. Rewrite

1. she often wore jeans when she was young.

=>She used.........to wear a pair of jeans ( Sửa lỗi này bạn lưu ý nha a pair of mới chính xác nha)...............................

2. he is not a poor man any more.

=> he used....to be a poor man..........................................

3. Nga enjoys listening to traditional stories.

=>Nga is...interested in listening to traditional stories.................................

4. she doesn't have money to buy this car. (rich)

=> she...isn't rich enough to buy this car...........................................

5. you should not stay up so late in the evening.

=>you had......better not stay up so late in the evening ......................

6. my parents didn't let me go out in the evening.

=>my parents didn't allow.me to go out in the evening.......................................................

7. Sarah needs to improve her English.

=>Sarah's English. needs to be improved............................................

8. we are going to teach our students some new English words tomoow.

=> some new english words..are going to be taught by our teachers........................................

9. This hose is considered not to be as expensive as many people think.

=>they think that this house is considered not .to be expensive.............................................

10. ''what did you do yesterday?'' her friend asked.

=>her friend wanted to know.......What I had done the day after................................................

1.we stopped _______( have ) dinner on the way home 2. mary needs ________ ( find ) another job. Her company is going out of business 3.he tried _______ ( avoid ) _____ ( answer ) my question 4.have you finished ________ ( write ) your compostion yet? 5.i must remember ____________ (post) this letter today.It's important 6.I considered __________ (apply) for the job but in the end i decided ____________ (not/ apply ) for it 7.tim suggested ______ (walk) for a while, but nobody wanted...
Đọc tiếp

1.we stopped _______( have ) dinner on the way home

2. mary needs ________ ( find ) another job. Her company is going out of business

3.he tried _______ ( avoid ) _____ ( answer ) my question

4.have you finished ________ ( write ) your compostion yet?

5.i must remember ____________ (post) this letter today.It's important

6.I considered __________ (apply) for the job but in the end i decided ____________ (not/ apply ) for it

7.tim suggested ______ (walk) for a while, but nobody wanted ______ (go) out

8.i like _______ (lie) on the beach . I always spend my holidays _______( sunbathe )

9.my uncle used _____ (be ) on footballer, but he had to stop _______(play) because of an injury

10.' do you enjoy ______(lie) on the beach ?' ' no, i really dislike _______( sit ) on the beach all day

11.andrew doesn't mind _____(walk) home, but his sister would likw _______(get) a taxi

12.sandra gave up ______ (try) to find a job in this country and decided ________(go) abroad

13.' are you looking forward to ______ (see) ann again ?' 'well,i expect _______(meet) her soon

14.the teacher told everybody _______( be ) quiet, but they just went on _____(talk)

15.'i'm trying ______( repair ) my radio , but it doesn't work'

'why don't you try _______(change) the batteries . I think the batteries in the radio need _________(change)

2
23 tháng 8 2018

1.we stopped ___having____( have ) dinner on the way home

2. mary needs ____to find ____ ( find ) another job. Her company is going out of business

3.he tried ___to avoid_ ( avoid )_answering__ ( answer ) my question

4.have you finished writing ( write ) your compostion yet?

5.i must remember __to post__ (post) this letter today.It's important

6.I considered __appling___ (apply) for the job but in the end i decided ____not to apply ___ (not/ apply ) for it

7.tim suggested __walking__ (walk) for a while, but nobody wanted ___to go___ (go) out

8.i like __lying_____ (lie) on the beach . I always spend my holidays ____sunbathing___( sunbathe )

9.my uncle used _to be____ (be ) on footballer, but he had to stop ____playing___(play) because of an injury

10.' do you enjoy __lying____(lie) on the beach ?' ' no, i really dislike ____sitting___( sit ) on the beach all day

11.andrew doesn't mind _walking____(walk) home, but his sister would likw __to get_____(get) a taxi

12.sandra gave up ___trying___ (try) to find a job in this country and decided _____to go___(go) abroad

13.' are you looking forward to __seeing____ (see) ann again ?' 'well,i expect ____to meet___(meet) her soon

14.the teacher told everybody _to be______( be ) quiet, but they just went on _talking____(talk)

15.'i'm trying ___to repair___( repair ) my radio , but it doesn't work'

'why don't you try _to change______(change) the batteries . I think the batteries in the radio need _____changing____(change)

23 tháng 8 2018

1.we stopped to have ( have ) dinner on the way home

2. mary needs to find ( find ) another job. Her company is going out of business

3.he tried to avoid ( avoid ) ansewer ( answer ) my question

4.have you finished to write ( write ) your compostion yet?

5.i must remember to post (post) this letter today.It's important

6.I considered to apply (apply) for the job but in the end i decided not to apply (not/ apply ) for it

Fill in the blanks with the correct modal verb: can, can't, should, shouldn't, must, mustn't, have to, dont' have to. 1. ............ you help me, please? 2. You ............ do more sport if you want to lose weight. 3. You ............ do your homework first if you want me to let you go out with your friends. 4. He has just broken his leg so he ............ play football. 5. Drivers ............ drive over the speed limit. 6. I ............ speak Chinese: it's too difficult! 7....
Đọc tiếp
Fill in the blanks with the correct modal verb: can, can't, should, shouldn't, must, mustn't, have to, dont' have to. 1. ............ you help me, please?
2. You ............ do more sport if you want to lose weight.
3. You ............ do your homework first if you want me to let you go out with your friends.
4. He has just broken his leg so he ............ play football.
5. Drivers ............ drive over the speed limit.
6. I ............ speak Chinese: it's too difficult!
7. She ............ take an umbrella; it's going to rain!
8. We ............ take photos inside; it's not forbidden.
9. I think we ............ take this road; it's not on my map!
10. You look pale! You ............ sit down and have a glass of water.
11. We ............ stop when the traffic light is red.
12. How ............ you say such a thing?
13. You ............ take the blue one: it suits you!
14. You ............ smoke so much: it's bad for health.
15. We ............ book a table in advance. There's plenty of room in that restaurant on Mondays. 16. You ............ forget her birthday again. 17. You ............ brush your teeth three times a day. 18. We............ drive fast, we have a plenty of time,
3
4 tháng 1 2020

Fill in the blanks with the correct modal verb: can, can't, should, shouldn't, must, mustn't, have to, dont' have to.

1. ........can... you help me, please?
2. You .....should....... do more sport if you want to lose weight.
3. You ......must..... do your homework first if you want me to let you go out with your friends.
4. He has just broken his leg so he .....can't....... play football.
5. Drivers .......mustn't..... drive over the speed limit.
6. I ......can't...... speak Chinese: it's too difficult!
7. She ....should........ take an umbrella; it's going to rain!
8. We .......can..... take photos inside; it's not forbidden.
9. I think we ........shouldn't.... take this road; it's not on my map!
10. You look pale! You ......should..... sit down and have a glass of water.
11. We ....must........ stop when the traffic light is red.
12. How .....can....... you say such a thing?
13. You ........should.... take the blue one: it suits you!
14. You ......shouldn't...... smoke so much: it's bad for health.
15. We ......don't have to...... book a table in advance. There's plenty of room in that restaurant on Mondays.

16. You ......shouldn't..... forget her birthday again.

17. You ......should...... brush your teeth three times a day.

18. We......musn't...... drive fast, we have a plenty of time,

4 tháng 1 2020

Fill in the blanks with the correct modal verb: can, can't, should, shouldn't, must, mustn't, have to, dont' have to.

1. Can you help me, please?
2. You should do more sport if you want to lose weight.
3. You have to do your homework first if you want me to let you go out with your friends.
4. He has just broken his leg so he mustn't play football.
5. Drivers mustn't drive over the speed limit.
6. I .can't speak Chinese: it's too difficult!
7. She should take an umbrella; it's going to rain!
8. We mustn't take photos inside; it's not forbidden.
9. I think we shouldn't take this road; it's not on my map!
10. You look pale! You should sit down and have a glass of water.
11. We must stop when the traffic light is red.
12. How should you say such a thing?
13. You can take the blue one: it suits you!
14. You musn't smoke so much: it's bad for health.
15. We should book a table in advance. There's plenty of room in that restaurant on Mondays. 16. You shouldn't forget her birthday again. 17. You should brush your teeth three times a day. 18. We don't have to drive fast, we have a plenty of time,

II/ Put the verbs in the brackets in to the correct form V/ TO V/ V-ing 1. I'm afraid Mr Pitt isn't in. Would you like (speak) to speak to his secretary' 2. I call Nhi but she pretended not to hear and went on(do) her work 3. My mother love(cook) 4. Dang,stop(talk)! The class is noisy just because of you 5. I am do the exercises carefully to avoid(make) mistakes 6. I prefer(play) chess to going to the theater 7. Do you mind(move) your chair a bit side? 8. Have you finished(work) on yout...
Đọc tiếp

II/ Put the verbs in the brackets in to the correct form V/ TO V/ V-ing
1. I'm afraid Mr Pitt isn't in. Would you like (speak) to speak to his secretary'
2. I call Nhi but she pretended not to hear and went on(do) her work
3. My mother love(cook)
4. Dang,stop(talk)! The class is noisy just because of you
5. I am do the exercises carefully to avoid(make) mistakes
6. I prefer(play) chess to going to the theater
7. Do you mind(move) your chair a bit side?
8. Have you finished(work) on yout project?
9. Do you enjoy(listen) to Pop music?
10.Quang has always hated(do) his homework
11. My brother spent hours..........(repair) his motorbiker.
12. Don't forget to bring my dictionary when you ..........(come) back tomorrow.
13. You..........(feel) cold if the sun ..........(not shine) .
14. I'm tired after that long walk. I'm not used to..........(walk) so far.
15. Bill never carries money with him. He's afraid of ..........(rob)
16. It is easy (be) wise after the event.
17. Do you (wish) (make) a complaint?
18.We don't (want) anybody (know) that we are here.
19.If you can't (remember) his number you'd better (look) it up.
20. I want her (learn) Esperanto; I think everybody ought to (know) it?21. Visitors are asked (not feed) the animals.
III/ Combine these sentences with who , whom , which.
1. I thanked the woman. She helped me.
2. She is the most intelligent woman. I’ve ever met this woman.
3. The doctor is famous. You visited him yesterday.
4. Do you know the music? It is being played on the radio.
5. These children are orphans. She is taking care of these children.
6. She couldn’t come to the party. This is a pity.
7. The man answered the phone. He said Tom was out.
8. Who is the woman? We met her here last year.
9. Try to read the book . I gave it to you yesterday.
10. A typhoon is a violet tropical storm. It can cause great destruction.

1
5 tháng 3 2020

II/ Put the verbs in the brackets in to the correct form V/ TO V/ V-ing
1. I'm afraid Mr Pitt isn't in. Would you like (speak) to speak to his secretary'
2. I call Nhi but she pretended not to hear and went on(do)doing her work
3. My mother loves(cook) cooking
4. Dang,stop(talk) talking! The class is noisy just because of you
5. I am do the exercises carefully to avoid(make) making mistakes
6. I prefer(play) playing chess to going to the theater
7. Do you mind(move) to move your chair a bit side?
8. Have you finished(work) worked on yout project?
9. Do you enjoy(listen) listening to Pop music?
10.Quang has always hated(do) doing his homework
11. My brother spent hours.repairing....(repair) his motorbiker.
12. Don't forget to bring my dictionary when you .....come.....(come) back tomorrow.
13. You....will feel.....(feel) cold if the sun ....doesn't shine......(not shine) .
14. I'm tired after that long walk. I'm not used to....walking......(walk) so far.
15. Bill never carries money with him. He's afraid of ....robbing......(rob)
16. It is easy (be) to be wise after the event.
17. Do you (wish) wish (make)made a complaint?
18.We don't (want)want anybody (know)know that we are here.
19.If you can't (remember) remember his number you'd better (look)look it up.
20. I want her (learn)to learn Esperanto; I think everybody ought to (knowknow ) it?21. Visitors are asked (not feed)not to feed the animals.
III/ Combine these sentences with who , whom , which.
1. I thanked the woman. She helped me.

=> I thanked the woman who help me
2. She is the most intelligent woman. I’ve ever met this woman.

=> She is the most intelligent woman who I've ever met
3. The doctor is famous. You visited him yesterday.

=> The doctor is famous who you visited yesterday
4. Do you know the music? It is being played on the radio.

=> Do you know the music which is being played on the radio
5. These children are orphans. She is taking care of these children.

=> These children are orphans who she is taking care of

20 tháng 2 2019

1. You look tired. Sit down and have a cup of tea.

2. I'm looking for yesterday's newspapers. Did you throw it away ?

3. Could i try on these shoes, please? Size nine.

4. Turn off the music. It's too loud!

5. I turned on the radio and listened to the six o'clock news.

6. I used to smoke, but i gave it up last year.

7. Just go along with what you were doing.

8. Pick up you litter! Son't drop it on the street!

9. Don't worry about the baby. I'll look for her while you're out.

10. I'm looking forward to meeting her very much.

11. Who do you take after the most, your father or your mother?

12. I ran into an old friend in the street this morning.

13. 'How do you spell this word?' 'I'm not sure. You'd better look it up in your dictionary.

14. Look up ! The car is coming!

15. The show was called off because of the rain.

18 tháng 9 2022

14. look out ạ, không phải look up

make conditinal sentences 1. she got married at such an early age' so she isn't at university now 2. she works in the evening , she has no time to play with her children 3. as she is often absent from class, she can't keep pace with her classmate 4. it's very cold' so we can't go swimming 5. you drink too much coffee ' that's why can't sleep 6. we don't have a big house. we can't invite friends to stay 7. the flats are not clearly numbered, so it is very difficult to find anyone 8. i...
Đọc tiếp

make conditinal sentences

1. she got married at such an early age' so she isn't at university now

2. she works in the evening , she has no time to play with her children

3. as she is often absent from class, she can't keep pace with her classmate

4. it's very cold' so we can't go swimming

5. you drink too much coffee ' that's why can't sleep

6. we don't have a big house. we can't invite friends to stay

7. the flats are not clearly numbered, so it is very difficult to find anyone

8. i couldn't write to Alice because i didn't know her address

9. we got lot because we didn't have a map

10. the farmers didn't have enough rain , so they could not grow rice

11. his friends were late so they missed the train

12. make me some coffee, and i'll give you one of my biscuits

13. you won't ask the teacher . he won't explain the lesson to you

14. city life isn't enjoyable because eveything is very expensive

15. i didn't bring extra money with mw because you didn't tell me we were going to diner after the movie

1
16 tháng 8 2018

make conditinal sentences

1. she got married at such an early age' so she isn't at university now

if she hadn't got married at such an early age , she would have been at university now

2. she works in the evening , she has no time to play with her children

if she didn't work in the evening , she would have time to play with her children

3. as she is often absent from class, she can't keep pace with her classmate

if she wasn't often absent from class, she could keep pace with her classmate

4. it's very cold' so we can't go swimming

if it wasn't cold, we could go swimming

5. you drink too much coffee ' that's why can't sleep

if i didn't drink too much coffee I could sleep

6. we don't have a big house. we can't invite friends to stay

if we had a big house. we could invite friends to stay

7. the flats are not clearly numbered, so it is very difficult to find anyone

if the flats were clearly numbered, it wouldn't be very difficult to find anyone

8. i couldn't write to Alice because i didn't know her address

if I had known alice's address, I would have written to her

9. we got lost because we didn't have a map

if we had had a map, we wouldn't have got lost

10. the farmers didn't have enough rain , so they could not grow rice

if the farmer had had enough rain , they would have grown rice