15. She should avoid ______________ other people’s feelings.
A. hurting B. to hurt C. hurt D. hurts
16. The soil needs _____________immediately.
A. fertilize B. to fertilize C. fertilizing D. fertilized
17. They advise me ___________ a raincoat.
A. wear B. to wear C. wearing D. wore
18. You need ___________ these plants as soon as possible.
A. fertilize B. to fertilize C. fertilizing D. fertilizes
19. You’d better ____________ what you think in front of the conference.
A. say B. to say C. saying D. said
20. He always tries _________ __________there ___________her.
A. delaying/ coming/ meet B. to delay/ to come/ to meet
C. delaying/ come/ meeting D. to delay/ coming/ to meet
21. There is nothing __________ this situation to her.
A. hide B. to hide C. hiding D. hidden
22. I regret ___________ able to attend your birthday party yesterday.
A. not to be B. to not be C. not be D. not being
23. Thank you for ____________ me such a warm message.
A. send B. to send C. sending D. sent
24. She detests _____________all day with strangers.
A. chatting B. to chat C. to chatting D. chat
25. _______a car when they were living in London?
A. Have they B. Did they have C. Were they having D. Have they had
26. A few days ago, I _______that Jane _______for New York.
A. learn – had left B. learned – had left C. learned – has left D. learn – will leave
27. He has been selling motorcycles _______.
A. ten years ago B. since ten years C. for last ten years D. for ten years
28. He fell down when he _______towards the church.
A. run B. runs C. was running D. were running
29. Sorry, I can’t stop now. I _______to an important appointment
A. go B. am going C. have gone D. was going

30. They _______serving meals by the time we get to the restaurant.
A. will stop B. stopped C. are stopping D. will have stopped

Giup mình với ạ TT

1. I’d love _____________ a coat like that.
A. have B. to have C. having D. has
2. I intend _____________ her what I think.
A. tell B. to tell C. telling D. told
3. Every hour I stop ___________ ____________a little rest.
A. working/ to have B. to work/ to have C. working/ having D. to work/ having
4. You should give up ____________right now if you want _____________ longer.
A. smoke/ lived B. to smoke/ living C. smoking/ to live D. smoked/ live
5. Students stopped ______________noise when the teacher came in.
A. make B. to make C. making D. made
6. When you see her, don’t forget ____________ her my postcards.
A. give B. to give C. giving D. given
7. Don’t forget ___________ him the message when you see him.
A. give B. to give C. giving D. gave
8. He spends hours ___________ to repair his car.
A. try B. to try C. trying D. tries
9. I remember _____________ you somewhere last month.

10

A. met B. to meet C. meet D. meeting
10. Mary agreed ____________ to the circus with Ann.
A. went B. to go C. going D. goes
11. Mike is considering ____________ a new car.
A. bought B. to buy C. buying D. buys
12. It’s no use ___________ his opinion.
A. asking B. to ask C. ask D. asks
13. Mrs. Green prefers ________ TV to ____________ to the cinema.
A. watching/ go B. to watch/ going C. watching/ going D. watches/ go
14. She expects ___________him tomorrow, but I look forward to___________ him right away.
A. see/ see B. to see/ see C. see/ seeing D. to see/ seeing
15. She should avoid ______________ other people’s feelings.
A. hurting B. to hurt C. hurt D. hurts

Giups mình với ạ !

1. _________ you _________ this test an hour ago?
A. do/do B. are/doing C. did/do D. have/done
2. It’s the sixth time I_________ this novel.
A. have been reading B. am reading C. have read D. read
3. Thomas_________ Spanish since 2005.
A. learnt B. is learning C. have learnt D. has learnt
4. Paul_________ to learn French in 2005.
A. have begun B. has begun C. begins D. began
5. They_________ Hoi An several times
A. have visited B. visited C. has visited D. will visit
6. My mother_________ a chance to visit Hue.
A. never has B. has never had C. had never had D. never had
7. Vanessa_________ a famous pop star since she_________ 16
A. became/was B. becomes/was C. have become/was D. has become/was
8. _________ you ever_________ in HN before?
A. did/be B. have/been C. have/are D. has/lived
9. Our city_________ a lot so far
A. changes B. has changed C. changing D. changed
10. How long_________ you_________ in Hue last summer?
A. have/lived B. do/live C. have/been living D. did/live

giúp mình với ạ,mình cảm ơn !

Vi khuẩn E.coli có kiểu dinh dưỡng nào:

A:Quang tự dưỡng

B.Hóa tự dưỡng

C.Quang dị dưỡng

D.Hóa dị dưỡng

kết bán nhé 

Serena đáng yêu

hihihihi ^^ hihi Serena đáng yêu

a) \(P=\left(x+2\right)^3+\left(x-2\right)^3-2x\left(x^2+12\right)\)

   \(P=x^3+6x^2+12x+8+x^3-6x^2+12x-8-2x^3-24x\)

   \(P=0\)

   => P không phụ thuộc vào giá trị của biến x

b) \(Q=\left(x-1\right)^3-\left(x+1\right)^3+6\left(x+1\right)\left(x-1\right)\)

   \(Q=x^3-2x^2+2x-1-x^3-2x^2-2x-1+6x^2-6\)

   \(Q=2x^2-8\)

=> Q phụ thuộc vào giá trị của biến x