Review: Modals

1. You ... conduct any chemistry experiments unless you are wearing safety glasses.

• mustn't

• don't have to

2. 2. There are a lot of books which Anna ... as part of her university course, but which she decided to read out of interest.

• did not have to read

• need not have to read

3. 3. We ... talk for too long. These calls are expensive.

• don't have to

• We'd better not

4. 4. I went to see the dentist yesterday, but luckily ... any painful treatment.

• I didn't need to have

• I needn't have had

5. 5. You ... about the party. Now it's not a surprise!

• didn't have to tell me

• shouldn't have told me

5. 6. Why don't you phone Katie now? She ... yet.

• can't have left

• must have left

• might have left

7. 7. Take some sun-block and wear a hat, as it ... get very hot in the middle of the day.

• must

• can

• could have

8. 8. There is no point waiting here any longer. We ... go and have something to eat.

• can hardly

• are bound to

• might as well

9. 9. Lucky you managed to hang on to that tree. You ... down the cliff.

• could have fallen

• must have fallen

• may have fallen

10. 10. 'What am I going to do about a present for Carol?' You ... some flowers.'

• might have sent her

• must have sent her

• could always send her