1. Before electricity was discovered, oil lamps _____________.

A. had been used B. used C. has used D. has been used

2. “Why did Khanh grow a beard?”. “To avoid ____________ “

A. anyone to recognize him B. being recognized

C. to be recognized D. recognizing him

3. That man was ____________ in a road accident last week.

A. injured B. destroyed C. ruined D. damaged

4. Picasso was a __________________ cubist artist.

A. good- know B. good- know n C. well- know D. well- known

5. Be ___________ those glasses! Don’t break them.

A. careful about B. careful of C. careful with D. particular about

6. After retiring, my aunt spent her _____________ on an expensive holiday.

A. dollars B. accounts C. savings D. cheques

7. A lot of people left school at 16 and they now _______________ leaving so early.

A. sorry B. regret C. confuse D. worry

8. “This technology is useless if you __________________ to operate it.

A. don’t train B. aren’t trained C. won’t trained D. haven’t trained

9. Some of my friends are taking extra classes in English ­­­­­­­­­­­­­­­­­­­­­­­­______________ become tourist guide.

A. so that B. so as C. in order that D. so as to

10. Michael and his friend were badly injured in the last match, so ____________ can play today.

A. both of them B. either one of them C. neither of them D. not any of them

11. Mary put a ______________ on the letter.

A. five-cents stamp B. five-cent stamp

C. stamp of five cents D. five-cent stamps

12. We quarreled _____________ the choice of a house.

A. on B. over C. for D. to

13. There are a lot of people at my friend's wedding party, only a few of ____________I had met before.

A. who B. whose C. whom D. which

14. You should have known that Anne could not keep a secret. Never again ____________ her anything.

A. will tell B. will I tell C. I tell D. I will tell

15. Quite soon, the world is going to ______________ energy resources.

A. run out of B. get into C. keep up with D. come up again

16. The students have got ______________ news about their exams.

A. many B. some C. few D. a few

17. Mary: “Is it far to the international airport from here?” - Jane: “_________”

A. Yeah, it’s pretty far. B. By taxi.

C. None at all. D. Sure, no problem.

18. “No one can play football as well as Bill.” - “_________”

A. You’re right. He doesn’t play it well. B. Yes, he’s a professional player.

C. No, he doesn’t like football. D. Yes, about once a week.

19. _________ to the national park before, Sue was amazed to see the geyser.

A. Being not B. Not having been C. Have not been D. Having not been

20. My friend’s Japanese digital camera _________ away. He can’t find it.

A. is taken B. has been taken C. was taken D. took

1. My brother is using the computer at the moment.

ð The computer­­­­­­­­­­­ _______________________________________________________________.

2. My parents are proud of my brother’s contribution to the football team.

ð My parents are proud of what __________________________________________________.

3. Although James was disabled, he participated in many sports.

ð Despite his _________________________________________________________________.

4. “ Why don’t you do morning exercise to keep fit.” He said to his daughter.

ð He suggested _______________________________________________________________.

5. I am sorry I was rude to you yesterday.

ð I apologize _________________________________________________________________.

6. Let’s invite Mary to the party on Sunday.

ð Peter suggested ___________________

7. There was no conclusion at the end of the workshop.

ð They did not ______________________________________________________________

8. The plane had hardly left the airport when a big problem occurred.

ð No sooner ______________________________________________________________

9. We couldn't buy that car because of its high price.

ðThat car couldn’t __________________________________________________________

10. Only three out of the six rooms we have booked have air conditioning.

ð We have booked six rooms, only three _________________________________________

- I don’t know what or who she (1- laugh) _______ at. I don’t think there is anything funny.

- According to plan, this time next week they (2- attend) ______ an important meeting in Paris.

- (3- Write) ________ the letter, she put it carefully in an envelope.

- The new students hope (4- include) ________ in many of the school’s social activities.

- If you don’t hurry, all the tickets (5- sell) ________ by the time we (6- get) ________ there.

- Some of my friends’ children (7- complain) __________ that their parents were always checking on them.

- I was careful not to hint or remind her in any way of what she (8- tell) __________ me.

- Hoa thinks her dress is a little bit too long, so she plans to get it (9- shorten) ___________________ .

- Nothing in my life (10- be) ________________ so strong to stop me achieving my goals so far.

Giải phương trình \(x\left(\dfrac{5-x}{x+1}\right)\left(x+\dfrac{5-x}{x+1}\right)=\dfrac{21}{4}\)

Tìm GTLN của \(x^2\left(3-x\right)\) với \(x< \dfrac{1}{3}\)

Cho \(36a^2+16b^2=9\). Tìm min và max của A-2a+b=5