Ответ:

1. Helen speaks French so well because she has lived in France.

2. She lived there last year.

3. The rain has stopped and the sun is shining in the sky again.

4. The rain stopped half an hour ago.

5. Mary has bought a new hat.

6. I bought a pair of gloves yesterday.

7. The wind has blown off the man's hat, and he cannot catch it.

8. The weather has changed, and we can go for a walk.

9. The wind changed in the morning.

10. We travelled around Europe last year.

11. My father knows so much ebcause he has travelled a lot.

12. I have seen Pete today.

13. She saw this film last Sunday.

14. Alex met his friend two hours ago.

15. I have just met our teacher.

16. The children have already decided what to do with the books.

17. Yesterday they decided to help their grandmother.

18. I have not seen your for a long time. I saw you in town two or three days ago, but you didn't see me. I was on a bus.