Auxiliaries 3.1
1. We _____ some work, though a lot of our workers were ill.

were able to do
have to do
might do
2. We _____ you, even if we had wanted to.

couldn't have helped
haven't been able to help
can't help
3. If the police question him, _____ to keep the secret?

can he
will he be able
will he be allowed
4. He _____ the house, because the door was locked.

can't leave
couldn't leave
might not leave
5. If he tells the police, he _____ keep the watch he found.

won't be allowed to
wouldn't be allowed to
wouldn't be able to
6. You _____ not smoke here.

must
shall
should
7. The gerund ______ be used after prepositions.

must
shall
should
8. He _____ be an old man by now.

must
have to
should
9. You _____ be tired after such a long journey.

must
have to
shall
10. She _____ not have the key, in which case we'll have to ask someone else.

can
may
must
11. I _____ be in the office at nine.

must
have to
should
12. That pickpocket _____ be ashamed of himself.

could
might
ought to
13. Accidents _____ happen.

will
shall
should
14. Must I do all this work again? No, you _____ not. It's not necessary.

must
may
need
15. He has a bad cold. He _____ be in bed.

will
would
should

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