ai bt làm bài này k giúp mình với ạ
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13 tháng 8 2021
IV. Circle the best option to complete each sentence:
1. She usually _____ two hours a day
a. work b. is working c. works d. working
2. Don’t make noise. My mother _________ with her friends
a. is talking b. was talking c. talks d. talked
3. Listen! They _________ about the exhibition . Let’s join them
a. talk b. talked c. are talking d. have talked
4. Where _____ your sister born?
a. were b. was c. did d. is
5. We _____ have white wine, but we _____ red wine
a. didn’t/had b. don’t/had c. did/didn’t d. didn’t/have
6. When did you _________ see him?
a. recently b. already c. last d. lately
7. I _________ a bath when the phone rang
a. was having b. had c. am having d. have
8. I _____ her two week ago
a. seen b. was seeing c. saw d. have seen
9. I _____ to his house in 1991
a. moved b. have been moving c. have moved d. was moving
10. He came into the room while they _________ television
a. have watched b. watched c. were watching d. have been watching
11. I fell asleep when I _____ television
a. am watching b. am being watched c. was watching d. All are correct
12. They _____________ last week
a. didn’t come b. came not c. don’t come d. did come
13. Where are Geoff and Anne? _____________ in the garden
a. They’re sitting b. They sitting c. There sitting d. They’re siting
14. It’s very cold today and _____
a. It’s snowing b. it snows c. its snowing d. it snowing
15. She goes to the library twice a week. She _____________ read books there
a. never b. usually c. rarely d. once
16. At nine o’clock yesterday morning, we _____________ for the bus
a. are waiting b. waited c. were waiting d. was waiting
17. Tom _________ his hand when he was cooking the dinner
a. burnt b. was burning c. has burnt d. had burnt
18. He _________ me every Sunday, and we often go fishing together
a. came to see b. comes to see c. will be coming to seed. All answer are correct
19. The phone rang while she _________ dinner
a. cooks b. was cooking c. is cooking d. has cooked
20. My sister _________ trouble with her motobike now, so she has to take the bus to work
a. have b. is having c. was having d. had
21. When my mum got home, _________
a. the dinner be cooked b. I was cooking dinner
c. I am cooking dinner d. the dinner deing cooked
22. Emma and Katie usually _________ their grandmother at weekends
a. have visited b. visits c. visit d. are visiting
23. Peter was reading a book by Mark Twain _________ his friends came
a. while b. when c. during d. if
24. Look! That boy _________ an elephant over there
a. fed b. was feeding c. feeds d. is feeding
25. He _________ in London at the moment
a. studies b. has studied c. is studying d. will study
13 tháng 8 2021
nguồn :hoidap247
1. C. works
2. A. is talking
3. C. are talking
4. B. was
5. A. didn’t/had
6. C. last
7. A. was having
8. C. saw
9. A. moved
10. C. were watching
11. C. was watching
12. A. didn’t come
13. A. They’re sitting
14. A. It’s snowing
15. B. usually
16. C. were waiting
17. A. burnt
18. B. comes to see
19. B. was cooking
20. B. is having
21. B. I was cooking dinner
22. C. visit
23. B. when
24. D. is feeding
25. C. is studying
7 tháng 8 2021
1.
a) Mary is as thin as her brother.
b) A lemon is not as sweet as an orange.
c) A donkey cannot run as quick as a horse.
d) This dress is twice as pretty as that one.
e)They don't drive a car as dangerous as us.
7 tháng 8 2021
1. So sánh ngang bằng.
a. Mary/thin/her brother.
Mary is as thin as her brother.
b. A lemon/not sweet/ an orange.
A lemon isn't as sweet as an orange.
c. A donkey/not run/quick/ a horse.
A donkey doesn't run as quickly as a horse.
d. This dress/twice/pretty/that one.
This dress is twice as pretty as that one.
e. They/ drive a car/ dangerous/ we.
They drive a car as dangerously as we do.
2. So sánh hơn: (Nhấn mạnh các câu ss hơn)
a. this film /popular/ that one.
This film is much more popular than that one.
b. A bird/can fly/slow/ a plane.
A bird can fly much more slowly than a plane.
c. Ba/ friendly/ Nam.
Ba is much more friendly than Nam.
d .Your house/far/from school /my house.
Your house is much farther from school than my house.
e. My father / drive/ careful/ I
My father drives much more carefully than I do.
3. So sánh nhất: (Nhấn mạnh theo 2 cách đã học)
a. This road/short /way/ in the city.
This road is by far the shortest way in the city.
b. Lan/ walk/ slow / in my class.
Lan walks by far the most slowly in my class.
c. Indian tea/bad/ of all.
Indian tea is by far the worst of all.
d. Anna/ work/ simple/girl/ in the world.
Anna works by far the simplest girl in the world.
e. Jack/ can tell/ the stories/ humourous/ in the world.
Jack can tell the stories by far the most humorously in the world.
II. Rewrite these sentences
1. This street is narrower than that one
Þ That street isn't as wide as this one.
Þ That street is wider than this one.
2. Linda drives more carefully than Peter
Þ Peter doesn't drive as carefully as Linda.
Þ Peter drives more carelessly than Linda.
3.Your car is more convenient than mine
Þ My car isn't as convenient as yours.
Þ My car is less convenient than yours.
4. We behave more politely than her
Þ She doesn't behave as politely as us.
Þ She behaves more impolitely than us.
5.I cook better than my mother
Þ my mother doesn't cook as well as me.
Þ my mother cooks worse than me.
6. Anna isn’t as confident as me
=> I am more confident than Anna.
7. This book isn’t as boring as that one
Þ That book is more boring than this one.
8. I don’t work as effectively as he does
=> He works more effectively than I do.
9. My bedroom isn’t so comfortable as yours
Þ Your bedroom is more comfortable than mine.
10. John didn’t speak English as well as Mary
=> Mary spoke English better than John.
11. Peter can dance the most gracefully in my city
=> No one in my city can dance as gracefully as Peter.
=> No one in my city can dance more gracefully than Peter.
12. Kangaroo is the most unique animal in the world
=> No animal in the world is as unique as kangaroo.
=> No animal in the world is more unique than kangaroo.
13. No river in the world is longer than Nile
=> Nile is the longest river in the world.
14. No student in my class learns Maths more intelligently than John
=> John learns Maths the most intelligently in my class.
15. If you read many books, you will have much knowledge
→ The more books you read, the more knowledge you will have.
16. He speaks too much and people feel bored.
→ The more he speaks, the more bored people feel.
a, \(\left\{{}\begin{matrix}35x-28y=21\\35x-45y=40\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}17y=-19\\x=\dfrac{3+4y}{5}\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}y=-\dfrac{19}{17}\\x=-\dfrac{13}{17}\end{matrix}\right.\)
b, Đặt x;y khác 0
Đặt 1/x = t ; 1/y = u
\(\left\{{}\begin{matrix}t-8u=18\\5t+4u=51\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}5t-40u=90\\5t+4u=51\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}-44u=39\\t=18+8u\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}u=-\dfrac{39}{44}\\t=\dfrac{120}{11}\end{matrix}\right.\)
Theo cách đặt y = -44/39 ; x = 11/120 (tm)
\(a,\\ \Leftrightarrow\left\{{}\begin{matrix}35x-28y=21_{\left(1\right)}\\35x-45y=40_{\left(2\right)}\end{matrix}\right.\\ Lấy\left(1\right)-\left(2\right),ta.đc:\\ -17y=19\Leftrightarrow y=\dfrac{-19}{17}\\ Thay.vào.\left(1\right):\\ 35x-28.\dfrac{-19}{17}=21\Leftrightarrow x=\dfrac{-5}{17}\)
Vậy ......
\(b,\\ \Leftrightarrow\left\{{}\begin{matrix}\dfrac{1}{x}=18+\dfrac{1}{y}\\5.\left(18+\dfrac{1}{y}\right)+\dfrac{4}{y}=51\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}\dfrac{1}{x}=18+\dfrac{1}{y}\\\dfrac{9}{y}=-39\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}\dfrac{1}{x}=18-\dfrac{13}{3}\\\dfrac{1}{y}=\dfrac{-13}{3}\end{matrix}\right.\\ \Leftrightarrow\left\{{}\begin{matrix}\dfrac{1}{x}=\dfrac{41}{3}\\\dfrac{1}{y}=\dfrac{-13}{3}\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=\dfrac{3}{41}\\y=\dfrac{-3}{13}\end{matrix}\right.\)