16D Can

17C Best

18 A should

19A beauty

20B up

21 D the largest

22 B better

23 B what does MK beach in Da Nang look like?

25 D thanks to

26 A so

27 C stop

28B went

29 B To start

30 C polluted

31 B have to 

33 B environment

35 C leave

36B like

37 C to make

38 C reusable

39 A on

40 B throw away

41 D  polluted air

42 B swap

43 D  to

44 D cleaner

45 B dirty

46D less

47D creative

48D in need

49C charity

50A i agree with you

IV

1 C collect --> collecting

2 B programme ---> programmes

3 D are coming --> come

4 A because of --> because

5 D to go

6 C will ---> won't 

7C to search --> searching

8 A didn't have --> had

9 C unfortunately ---> fortunately

10 A although --> because of

IV

1 does Lan walk or ride her bike to school?

2 what are there in front of your house?

3 Hoa learns english very bad

4 my brother hasn't seen his best friend for 2 months

5 she hopes Mary will come to the party tonight

6 people try to be nice and polite  with each other because thhey want good lucks on New Year's day

7 new market is inconvenient because it is far from our flat building

8 that channel tells people about life of animals around the world

9 they are worried that some people will use robots for bad things

10 if people plant more trees around this area, there will be no floods

11 i haven't talked to my uncle since he bought a new house in the city center

12 we were very interested in playing soccer when we lived in the countryside

13 i will not have a birthday party this year

14 my mother will prepare for my party next week

15 it has been a year since i didn't work with her

V

1 were you tired after the trip?

2 how many hours did it take her to finish herhomework?

3 what did they do 2 weeks ago?

4 how did they travel to Nha Trang?

5 why did she go to the doctor?

6 which subject did he teach in the high school?

7 when will they go to the beach?

8 how did the dress look?

Mik chỉ bt lm đến đây thôi sorry !

16.D

17.C

18.A

19.C

19.D

20.B

21.D

22.B

23.A

24.C

25.C

26.B

27.D

28.A

29.D

30.C

31.D

32.B

33.B

34.A

35.C

36.D

37.B

38.D

39.C

40.D

41.C

42.A

43.B

44.C

45.D

46.C

47.C

48.C

49.D

50.C

Good luck !