Ответ:

1. Victor has been working for an hour and a half.

2. Robert has been watching TV for two hours and a half.

3. Mr Cook has been fishing for three hours.

4. Jenny has been lying in the sun for half an hour.

5. The boys have been running for half an hour.

6. The Wenders have been driving  for an hour and a half.

7. The children have been playing football for an hour.

8. Jim has been reading a book for half an hour.

9. I have been waiting for you for an hour