Ответ:

2. Отрицательная: They haven't seen the Tower of London

Вопр: Have they seen the Tower of London?

4. Отриц: She hasn't read all the books

Вопр: Has she read all the books?

6. Отриц: My mother hasn't cooked dinner

Вопр: Has my mother cooked dinner?

8. Отриц: She hasn't written a letter

Вопр: Has she written a letter?

9. Отриц: I haven't been to Moscow

Вопр: Have I been to Moscow?