1. The boys may have smoked cigarettes. - Did the boys smoke cigarettes?

2. The man should not have drunk so much wine. - Did the man drink too much wine?

3. They should have told the boss the truth. - Did they tell the boss the truth?

4. The noise may have woken him up. - Did the noise wake him up?

5. They shouldn't have invited Tom to the party. - Did they invite Tom to the party?

6. The workers did not need to whitewash the ceiling. - Did the workers whitewash the ceiling?

7. The student could have written a better essay if he had had more time. - Did the student write the essay as well as he wanted?

8. William did not need to vacuum the carpets. - Did William vacuum the carpets?

9. Sue need not have contacted the travel agency. - Did Sue contact the travel agency?

10. It may have been the cat. - Was it the cat?