1.haven’t met

2.went

3.have lived

4.fell

b

16. Have you been - spent

17. have never met - looks

18. will have been- comes

19. found - had just left

20. arrive - will probably be raining

21. is raining - stops

22. were watching - failed

23. stayed - had lived

24. sat - were being repaired

25. turned - went - had forgotten

26. has changed - came

27. were talking - started - broke

28. had done

29. has been standing

30. have spent - got

31. were - studied

1.or

2.so

3.because

4.although

5.and

6.but

7.because

8.although

9.but

10.so

1. are - reach

2. comes

3. came - had left

4. has never flown

5. have just decided -would undertake

6. would take

7. was

8. am attending - was attending

9. arrive - will be waiting

10. had lived

11. Got - had already arrived

12. will see - see - will have graduated

13. visited - was

14. has been - haven’t you read

15. is washing - has just repaired

the police held back the fans who were trying to get onto the football pitch.
they carried out a survay to find out with tv channel was the most popular. 
We arrived an hour late because we were held up in traffic.
Could you hold on, please? Mrs Jones' line is engaged at the moment.
Carry on with that job until I give you something else to do.
The gang held up a security van and got away with millions.

1.  - Are you busy this evening? - Yes, I (meet) ………am meeting…. Tuan at the library at seven. We (study) …are studying…….. together.

2.  When we (be)       …were………. small, our family (live) ……lived……. in the countryside.

3.  Miss Trang is in hospital. - Yes, I know. I (visit) ……will visit…………. her tomorrow. 4.  I (read) …………am reading……. an interesting book at the moment. I (lend) ………will lend………. it to you when I finish it.

5.  Look at those black clouds. It (rain) ……is going to rain………….

6.  I (not invite) …….......won't invite........ her to the party because I (forget) …….....forget.......... her phone number.

7.  The boys like (play) ………playing………. games but hates (do) …………doing……. lessons.

8.  Please stop (talk) ………talking……...; I (try) ………am trying….…...  (finish) ………..…to finish….  a letter to the Y&Y Green Group.

9.  I (not go) …………won't go……. to his house unless you go with me.

10.         Would you like (come) ………to come………. to a disco this evening?

1.I am looking forward to going hiking on my vacation.

2.If you attend the class regularly, you can pass the test easily.

3.Anne had finished her homework, she read the book

4.I am too exhausted to go out tonight.

5. I last made a birthday cake for my mom in 2016.

6.The waitress asked me if I was waiting to be served.

7.The game was called off because it was raining heavily.

8.You should eat more fresh vegetables and less meat.

9.A new cinema is going to be built on the site of the old library.

10.Joana suggested that I should make cake in a pressure cooker.

1. have been learning

2. was not working - were not

3. want to pass - am going to study

4. sent

5. was - think - have learned

6. went - had not enjoyed

7. was doing - met

8. noticed

9. have - had

10. am revising

11. have already begun

12. think - will do

13. is - is not

14. pass - will start

15. will go

16. can see - have become

Lấy g = 10m/s² Lực Căng Của Dây Là: 241,9N