IV,

21, A -> were

22, B -> would

23, D -> was still sleeping

24, C -> will be

25, C -> built

V

26, You can use this computer, can’t you?

27, I wish I could remember the answer to these questions.

28, Nam said that he had to go to Ha Noi the next day.

29, It takes Nga 4 hours a day to practice English with her friends.

30, It is because of the heavy rain that we take our umbrellas.

I

1, D – pull

2, C – mineral

3, D – played

4, B – ethnic

5, B – pens

II

6, C – travel

7, D – raising

8, B – for

9, C – will you

10, D – be

11, D – No, do as you, please

12, A – not to go

13, D – forward to

14, C – I would

III

16, have visited

17, suggested

18, bought

19, bought

20, met