Ex II:

1. stops

3. will stay/ answers

4. catch

5. won't come/ are

6. will help/ finishes

7. is

8. will go

9. will wait/ come

10. will send/ arrive

*****

11. moved

12. didn't visit/ caught

13. are playing

14. have known

15. has travelled 

16. did you do/ went

17. have been

18. is staying/ is

19. is explaining

20. haven't seen/ were

21. hasn't finished

22. have used

23. visited/ met

Đáp án:

1. We'll go out when the rain stops.

2. I will stay here until he answers me.

3. I will wait until I catch you.

4. She won't come until you are ready.

5. Miss Helen will help you as soon as she finishes that letter tomorrow.

6. After the class is over, ask the teacher about that sentence.

7. I will come and see you before i leave here.

8. We will go home as soon as we have finished our work.

9. I will wait here until you come back tomorrow.

10.  I will send you some postcards as soon as I arrive  in London.