You _____ return the book now. You can keep it till next week.

A. can't B. mustn't C. needn't D. may not

Mother ______ us stories when we were young.

A. was used to tell B. is used to telling C. used to tell D. used to telling

I didn't hear the phone. I _____ asleep.

A. must be B. must have been C. should be D. should have been

He _____ you more help, even though he was very busy.

A. might have given B. might give C. can't have given D. may give

Jane _____ have kept her word. I wonder why she changed her mind.

A. must B. should C. need D. would

A computer _____ think for itself; it must be told what to do.

A. can’t B. can’t C. must D. will

We _____ last night, but we went to the concert instead.

A. must have studied B. might study C. should have studied D. would study

"Could I borrow your dictionary?" - "Yes, of course you _____.”

A. might B. will C. can D. should

Peter _____ come with us tonight, but he isn't very sure.

A. must B. may C. can D. will

Tom should not _____ me your secret, but he meant no harm.

A. have told B. tell C. be telling D. having told