2 did you do

3 standing

4 to do

5 to go

6 were talking

7 to rain

8 caused

9 to take

10 was built

11 was having

12 hasn't visited

13 have had

14 am going to tidy

15 understands

16 has won

17 was reading/was playing

20 reading

21 went

22 playing/play

24 opened

25 went

II.1 how often does your brother play video games?

2 why do you rarely eat out?

3 How long does Minh usually spend on computer games?

4 what is her son going to?

5 how many books are there in the new public library?

6 who did hoa play tennis with last weekend?

7 how far is it from viet's house to the arcade? 

8 whose letter did hoa receive five days ago?

9 how much does the new electric game cost?

10 how was nga when she crossed the road?