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Ответ:

Объяснение:

1. John said that he had never seen the place before.

2. At the moment John is reading a newspaper.

3. My mother was cooking dinner while I was watching TV

4. I came home after I had finished my work

5. They sent alll the letters they had written before

6. This book is interesting, but "Harry Potter" is more interesting

7. The Robinsons went to the Black Sea

8.You are such a great friend

9. Ypur sister goes to the gym every day, does not she?

10. You have not been to the doctor's yet,  have you?

11. Giles and Miles can't drive, can they?

12. Henry usually walks the dog himself