người ta dùng cân có hai cánh tay đòn không bằng nhau để cân một vật. Vật được đặt lần lượt ở hai đĩa cân, lần thứ nhất cân thăng bằng khi ở đĩa cân bên kia các quả cân có tổng khối lượng 11,52kg, còn lần sau các quả cân có tổng khối lượng 12,5kg. Tính khối lượng đúng một vật.

Để đi từ A đến B có thể dùng các phương tiện: máy bay, ô tô, xe lửa. Vận tốc của máy bay, ô tô, xe lửa tỉ lệ với 6;2;1. Biết rằng thời gian đi từA đến B bằng máy bay ít hơn so với đi bằng ô tô là 6 giờ. Hỏi thời gian xe lửa đi quãng đường AB là bao lâu?

They agreed to call off the strike on chấm chấm chấm that all those who had been dismissed were reinstated

a.terms      b.demand       c.request            d.condition

làm nhanh tui vote

 Read the following passage and mark the A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

Dan and Jenifer were (26) ___ their wedding. Before the big (27) ___,they bought a (28) ___, house with big trees all around and were busy repairing it - (29) ___ the walls and cleaning the floors. There were a little workshop nearby, Jenifer hung her beautiful white (30) ___ there to keep it clean.

Three days ago before the wedding, while Dan and Jenifer were at his family's home, a wild tornado (31) ___ from nowhere. The tornado missed his family's home, but when Dan drove to his house, it was not there. The trees (32) ___ the neighbor's house were gone. The tornado destroyed (33) ___ everything in the neighborhood. Just one thing was (34) ___ standing- the workshop. When Dan looked inside, he discovered the wedding dress untouched. He called Jenifer, “Your dress is here!“ I think your wedding is meant to be.“ The lucky (35) ___ cried at their wedding. “They're grateful to be here,“ explained a friend.

26) A.planned B.to plan. C.plan. D.planning

27) A.festival B.anniversary C.day D.party

28) A.50-year-old B.50-year-olds C.50-old-year D.50-years-old D. fixed

29) A.fixing. B.to fix. C.fix. D.fixed

30) A.skirt B.wedding dress C.dress D.fixed

31) A. blown B.came out C.flew D.left

32) A.as well B.as well as C.from D.but

33) A.almost B.except C.with D.all

34) A.never B.there C.still D.also

35) A.people B.guests C.couple D.invitees

Use the word at the end of each sentence to form a new word that fits into the sentence
1. The _____________ in this place is absolutely terrible. I want my money back. (SERVE)
2. Could you help me make a ___________ I don't know which phone to buy. (DECIDE)
3. Even very good clothes are quite ____________ in this shop. (AFFFORD)
4. There are no further ______________ for applying for this job. (REQUIRE)
5. My mother had no idea that this vase was so _________ (VALUE)
6. Companies should always tell the _______ in their advertisements. (TRUE)
7. Credit cards are really _________, but you have to be careful with them. (USE)
8. I read a __________ of all the new mountain bikes. This one is the best. (COMPARE)
9. Before you get money from the bank you have to make a ___________ about whether you can pay it back or not. (JUDGE)
10. He has been an ________ banker for ages. (INVEST)

rewrite the sentences

1. there aren't any chairs in the kitchen.

- the kitchen.......................................................

2. how many fans are there int the rooms?

- how many fans ..............................................

3. the pen is under the notebook.

- the notebook ..................................................

4. young children like disneyland.                 (popular)

- disneyland....................................................

Chọn và giải thích đáp án chọn giúp mình với:

1. When I last saw him, he ... in London

A. has lived B. is living C. was living D.has been living

2. Jack ... the door

A. has just painted B.paint C. will have painted D.painting

3. He has been selling motorbikes ________.

A. ten years ago B. since ten years

C. for ten years ago D. for ten years

4. Christopher Columbus _______ American more than 500 years ago.

A. discovered B. has discovered

C. had discovered D. had been discovering

5. He fell down when he ______ towards the church.

A. run B. runs C. was running D. had run

6. We _______ there when our father died.

A. still lived B. lived still C. was still lived D. was still living

7. They ______ table tennis when their father comes back home.

A. will play B. will be playing C. play D. would play

8. By Christmas, I _______ for Mr. Smith for six years.

A. will have been working B. will work

C. have been working D. will be working

9. I ______ to New York three times this year.

A. have been B. was C. were D. had been

10. I'll come and see you before I _______ for the States.

A. leave B. will leave C. have left D. shall leave

11. The little girl asked what _______ to her friend.

A. has happened B. happened

C. had happened D. would have been happened

12. John ______ a book when I saw him.

A. is reading B. read C. was reading D. reading

13. He said he _______ return later.

A. will B. would C. can D. would be

14. I have been waiting for you ______.

A. since early morning B. since 9 a. m

C. for two hours D. All are correct

15. Almost everyone _______ for home by the time we arrived.

A. leave B. left C. leaves D. had left

16. By the age of 25, he ______ two famous novels.

A. wrote B. writes C. has written D. had written

17. When her husband was in the army, Mary ______ to him twice a week.

A. was reading B. wrote C. was written D. had written

18. I couldn't cut the grass because the lawn mower ______ a few days previously.

A. broke down B. has been broken

C. had broken down D. breaks down

19. I have never played badminton before. This is the first time I _____ to play.

A. try B. tried C. have tried D. am trying

20. Since _______, I have heard nothing from him.

A. he had left B. he left C. he has left D. he was left

21. By the end of next year, George _______ English for two years.

A. will have learned B. will learn

C. has learned D. would learn

22. The man got out of the car, ________ round to the back and opened the book.

A. walking B. walked C. walks D. walk

23. He will take the dog out for a walk as soon as he ______ dinner.

A. finish B. finishes C. will finish D. finishing

24. I will be glad if he _______ with us.

A. had gone B. did go C. went D. goes

25. Ask her to come and see me when she _______ her work.

A. finish B. has finished C. finished D. finishing

26. Turn off the gas. Don't you see that the kettle ________?

A. boil B. boils C. is boiling D. boiled

27. Tom and Mary ______ for Vietnam tomorrow.

A. leave B. are leaving C. leaving D. are left

28. I ______ to the same barber since last year.

A. am going B. have been going C. go D. had gone

29. Her father ______ when she was a small girl.

A. dies B. died C. has died D. had died

30. Last week, my professor promised that he ________ today.

A. would come B. will come C. comes D. coming

Ai giải giúp mik thì mik xin cảm ơn!
Điền vào chỗ trống với các giới từ thích hợp:in,at,on,after,under,between,beside,among,above,beneath.
1.There is a bus station.............the end the road.
2.Keep those mecdicines............the children's reach.
3.I lost my keys somewhere................the car and the house.
4.Come..........and sit...........your sister.
5.D comes...............C in the alphabet.
6.The boat sank............. the waves.
7.Don't shelter............the trees when it's rainning.
8.Please put these books.............the bookshelf...........the desk.
9.I often fell nervous when I am.............strangers.
10.Children must attend school................the ages of 5 and 16.
Thanks trc nha:3

Viết lại câu bị động :

1. Will met you at the airport , Tom?

2. Did Aland write that report ?

3, Has anymore cleaned the room yet ?

4. Can students speak English in class ?

5. What will they have done by the end of the year ?

.You can't wash this dress ?

7. No one told me the truth ?

8. Will bus bring their children home ?

9. Why didn't they help him ?

10. The secretary opens the mails every day 

11. The teacher doesn't allow me to take the sear by the window

12. Tom's absence woried his mother

13. They are building a new shool in this town 

14. You should finish the report right now

15. We shall discuss the matter in the afternoon

        Chia 1 từ thích hợp để hoàn thành câu 

1, We ................playing table tennis very unteresting because we can meet and firends with interesting people .

2, My brother and I ................the same hobby 

3, I love ...............outboors in my garden to plant flowers and vegetables

4, My father likes ...................his bike in the park at the weekend

5,Tom and peter like water ...................and they go swimming , play water polo and sury tegether a lot 

6, My hobby is collepling .....................because I love reading whenever I have time

7,Why don t you ..............jogging beacause it can help you keep fit ?

                  Giúp mk mhé ! Thanks

1. large/ a/ Huong/ has/ with/ decorations/ lot/ a/ beautiful/on/ room/the/ of/ walls.

…………………………………………………………………………………..

2. is/ hard-working/ Sue/ student/ a/ and/reads/ books/ a/ lot/ she/ of/every month.

…………………………………………………………………………………..

3. She/ the/ participating/ is/ in/ sports/ of/ school/ next/ club/ semester./ the

…………………………………………………………………………………..

4. she/the/participating/is/in/sports/of/school next/club/semester/the.

..................................................................................................................

5. Lam/ lives/ near/ so/ his/goes/ school/ school/walk/ he/ to/ by.

…………………………………………………………………………………..

Chuyển thì trong ngoặc thành quá khứ đơn rồi điền vào chỗ trống, và chia thì cho đúng

1, I knew Sarah was very busy, so I ................. her(disturb)

2, I was very tired, so I ,,,,,,,,,,,,, the party each(leave)

3,The bed was very uncomtable. I ...................... very well( sleep)

4,I was in a hurry, so I ....................time to pphone you(have)

5,It was hard carrying the bag. They ..................very heavy(be)

Good luck