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1. If people can................... wastes, they will save a lot of money.
A. rebuild B. reduce C. reuse D. use
2. In the future, we won't go on holiday to the beach but we............ go on holiday to the Moon.
A. must B.can't C. might D. won't
3............the air is cleaner; people will have less breathing problems.
A. Unless B. When C. If D. Because
4. I might have a smartphone....................... the Internet.
A. surf B. surfing C. to surf D. to surfing
5. '' What can we do ......... air pollution?
A. reducing B. to reduce C. reduce D. to reducing
GOOD LUCKY
1. If people can................... wastes, they will save a lot of money.
A. rebuild B. reduce C. reuse D. use
2. In the future, we won't go on holiday to the beach but we............ go on holiday to the Moon.
A. must B.can't C. might D. won't
3............the air is cleaner; people will have less breathing problems.
A. Unless B. When C. If D. Because
4. I might have a smartphone....................... the Internet.
A. surf B. surfing C. to surf D. to surfing
5. '' What can we do ......... air pollution?
A. reducing B. to reduce C. reduce D. to reducing
Make sentences:
1. people/ there/ less/ pollution/ if/ recycle/ be/ air/ more/ will
if people recycle more , there will be less pollution
2. should/ amount/ your/ uses/ the/ you/ of/ family/ reduce/ electricity
you should reduce the amount of electricity your family uses
3. recycle/ materials/ save/ students/ they/ if/ energy/ will/ and/ recycled/ use
if the students recycle and use recycled materials , they will save energy
4. doesn't/ class/ Tom/ today/ to/and/ come/ probably/,/ won't/ either/ he/ tomorrow/ come
Tom doesn't come to class today and probably tomorrow he won't come, either
5. but/ called/ I/their/ no one/ the/ phone/ house/ answered
i called their house phone but no one answered
Viết lại câu là câu điều kiện loại 1
1.He doesn't take any exercises.He is so unhealthy =>If he takes exercises,he won't be unhealthy
2.We can’t get the ticket because I don’t have the right change.=> If i have the right change, we can get the ticket
3.Study hard or you won’t pass the exam.=>If you don't study hard, you won’t pass the exam.
4.Don’t be impatient or you will make mistakes.=>If you aren't impatient, you will make mistakes
5.My mother will have enough money.She will buy a new house=>If my mother has enough money, She will buy a new house
6.Getting up late makes him feel tired =>If he doesn't get up late, he won't feel tired
7.Henry will finish the report. He will go out for a walk=>If Henry finishes the report, he will go out for a walk
8.Do the homework for me, and i'll give you a gift =>If you do the homework for me, i'll give you a gift
9.Watching TV makes me feel relaxed=>If i watch TV, I'll feel relaxed
10. Don't tell lies to your boss or you'll be fired at once=>If you tell lies to your boss , you'll be fired at once
1.He doesn't take any exercises.He is so unhealthy
=>If He doesn't take any exercrise, he'll unhealthy
2.We can’t get the ticket because I don’t have the right change.
=> If I don't have the right change, we won't get the ticket
3.Study hard or you won’t pass the exam.
=>If you study hard, you'll pass the exam
4.Don’t be impatient or you will make mistakes.
=>If you impatient, you'll make mistakes
5.My mother will have enough money.She will buy a new house
=>If my mother have enough money, she'll buy a new house
6.Getting up late makes him feel tired
=>If he gets up late, he'll feel tired
7.Henry will finish the report. He will go out for a walk
=>If Henry finish the report, he'll go out for a walk
8.Do the homework for me, and i'll give you a gift
=>If you do the homework for me, I'll give you a gift
9.Watching TV makes me feel relaxed
=>If I watch TV, I'll feed relaxed
10. Don't tell lies to your boss or you'll be fired at once
=>If you tell lie to your boss, you'll be fired at once
Study hard 
1. Doris often goes home as soon as the class is over in order that her mother couldn't wait for her.
2. John gets up early so as not to be late for class.
3. These men were talking whisper in order not to anyone to hear their onversation.
4. We turned out the lights in order not to waste electricity.
5. This pupil read only for short periods each day in order not to to train his eyes.
6. The clown took off his mask in order not to cause accidents.
7. Sue dutifully followed her parents advice in order not to cause trouble for her parents.
Tìm và sửa lỗi sai:
1.If you don't drive your business, you are=>will be driven out of business.
2.Unless you paid=>pay your taxes, you will get into trouble.
3.We will go swimming if the weather won't=>isn't bad.
4.Unless ice melts, it turns=>will turn to water.
5.If you have toothache, visits=>visit the dentist.
Tìm và sửa lỗi sai:
1.If you don't drive your business, you are->will be driven out of business. 2.Unless you paid->pay your taxes, you will get into trouble. 3.We will go swimming if the weather won't->isn't bad. 4.Unless->If ice melts, it turns to water. 5.If you have toothache, visits->visit the dentist.
IIII. Chia động từ trong ngoặc:
1. She (not drink) ............doesn't drink........... coffee. She (drink) ..........drinks........... Coca Cola.
2. It (be) ...........is........... often hot in the summer.
3. What ..........do......... you (do) ..........do.......... every evening?
4. The earth (circle) .........circles.......... the sun once every 365 days.
5. I (see) ........see......... her very often.
6. Most rivers (flow) .........flow......... into the sea.
7. Vegetarians (not eat) ......don't eat...... meat.
8. Bees (make) ...........is made......... honey.
9. Rice (not grow) .........isn't grown........ in cold climates.
10. Where ...........does.......... Martin (come) ..........comes.......... from?- He (be) ............is.......... Scottish.
Chúc bạn học tốt!
1. My sister is old. She can drive a car
->My sister is old enough to drive a car
2. Mr. Robinson isn't rich. He can't buy a house.
-> Mr.Robinson isn't rich enough to buy a house
3. The worker is clever. He can make fine things from wood.
->The worker is clever enough for him to make fine things from wood
4. Ba is tall. He can play volleyball.
->Ba is tall enough to play volleyball
5. Lan is intelligent. She can do that test.
->Lan is intelligent enough to do that test
6. Hoa is skillful. She can make her own handkerchief.
->Hoa is skillful enough to make her own handkerchief
7. His parent are rich. They can buy a new car
->His parent are rich enough to buy a new car
8. Phong and Thu aren't tall. They can't play basketball.
->Phong and Thu aren't tall enough to play basketball
9. Tam is old. Hả can ride a motorbike.
->Tam is old enough to ride a motorbike
10. Phu is very strong. He can carry those heavy bags.
->Phu is strong enough to carry those heavy bags
11. The children are tired. They go to bed early.
->The children are tired enough to go to bed early
12. He is hungry. He eats three loaves of bread.
->He is hungry enough to eat three loaves of bread
13. We are thirsty. We can drink a lot of water.
->We are thirsty enough to drink a lot of water
14. She can reach the top of the cupboard. She's tall.
->She is tall enough to reach the top of the cupbroad
15.The ladder ins't very long. It doesn't reach the window.
->The ladder isn't long enough to reach the window
16. He is strong. He can carry the suitcase.
->He is strong enough to carry the suitcase
17. You aren't well. You shouldn't go to school today.
->You aren't well enough to go to school today
18. I am not strong. I can't help you.
->I am not strong enough to help you
19. He can touch the light because he is very tall.
->He is tall enough to touch the light
20. My brother is very generous. He willing lends someone's money.
->My brother is generous enough to lends someone's money
21. The radio isn't small. You can't put it in your pocket.
->The radio isn't small enough for your to put in your pocket
22. This coat isn't warm. I don't wear it in winter.
->This coat isn't warm enough for me to wear in winter
23. The weather was fine. We could go camping.
->The weather was fine enough for us to go camping
24. Those apples aren't ripe. We can't eat them.
->Those apples aren't ripe enough for us to eat
25. The house was very expensive. We couldn't afford to buy it.
->The house was expensive enough for us to afford to buy
26. He was not patient. He couldn't wait for you.
->He was not patient enough to wait for you
27. That chair is uncomfortable. I don't want to sit on it.
-> That chair is umcomfortable enough for me to want to sit on
28. These oranges are sour. We can answer ít.
->These oranges are sour enough for us answer
IIII. Chia động từ trong ngoặc:
1. She (not drink) ....doesn't drink... coffee. She (drink) ..drinks.. Coca Cola.
2. It (be) ....is.................. often hot in the summer.
3. What .......do............ you (do) .........do........... every evening?
4. The earth (circle) ....circles............... the sun once every 365 days.
5. I (see) ....see............. her very often.
6. Most rivers (flow) .......flow........... into the sea.
7. Vegetarians (not eat) .....aren't eat....... meat.
8. Bees (make) .....make............... honey.
9. Rice (not grow) .....isn't grow............ in cold climates.
10. Where ........does............. Martin (come) ..come.................. from?- He (be) .......is............... Scottish.
C. Complete each of the following sentences with your own words
1. We can't use water in this well because..it's polluted.
2. It's quiet and peaceful in the country so many people..travel here every year....
3..........Using......... public transport is a good way to reduce....the pollution.....
4 We'll have to go without John if he doesn't......arrive before 8.00......
5 Unless you study hard, you....will fail the exam.....
1. We can't use plastic bags again -> shouldn't
2.We should saving electricity -> save
3. If he goes home late, his mother doesn't let him get into his house -> won't
4. If he won't reduce soil, we won't have enough food to eat -> doesn't
5. Smoke from cars can not make the air polluted -> can
1. We can't use plastic bags again
>> Can
2.We should saving electricity
>> Save
3. If he goes home late, his mother doesn't let him get into his house
>> Won' t
4. If he won't reduce soil, we won't have enough food to eat
>> Doesn' t
5. Smoke from cars can not make the air polluter
>> pollution