We.... forget our identity card when we are travelling.
A.need
B.mustn’t
C.could not
D.have to

Look! She is laughing. She.... something funny or happy.
A.must have
B.must have had
C.could have had
D.can’t have had

Your diving equipment.... regularly if you want to keep it in good condition.
A.may be cleaned
B.can’t be cleaned
C.can clean
D.must be cleaned

Are you joking? David .... a new car last week. I am sure that he does not have money.
A.mustn’t be buying
B.would be buying
C.may have bought
D.can’t have bought

Our teacher is so strict. We.... forget to do our homework.
A.must
B.mustn’t
C.needn’t
D.may

.... you mind if I brought a colleague with me?
A.Can
B.Must
C.Would
D.Might

John was sacked last year. He.... harder.
A.may have worked
B.should have worked
C.must have worked
D.should be working

When you have a small child in the house, you.... leave small objects lying around.
A.may not
B.should not
C.needn’t
D.ought to

John.... drive when he was eighteen.
A.cannot
B.could not
C.would rather
D.might not

She…. that it is a good idea. It is crazy!
A.can’t think
B.must think
C.may have thought
D.could think