1. C. He is doubtful about the effect of the students’ action.

2. D. The class has kept the party a secret from Jay.

3. C. He left his things with his car in the garage.

4. D. TV comedies have not improved much since the 1960s.

5. D. The man should stop boiling the vegetables.

6. A. Sort out their tax returns.

7. A. He didn’t expect to complete his work so soon.

8. B. He has failed to register for the course.