Susan ___ hear the speaker because the crowd was cheering so loudly.
A.couldn't
B.might not
C.can't 
D.doesn’t

The company had sent the advertisement to the newspaper when they realised they’d mistyped the salary they were offering for the position. Luckily, they ___ the newspaper to correct their mistake before they printed it.
A.could have asked
B.must have asked
C.were able to ask
D.might have asked

You ___ be rich to be a success. Some of the most successful people I know haven't got a penny to their name.
A.can't 
B.shouldn't
C.don't have to
D. mustn’t

If it rains this weekend, we_________ camping.
A.don’t go 
B.won’t go  
C.didn’t go 
D.wouldn’t go

Kate: ___ hold your breath for more than a minute? Jack: No, I can't.
A.Might you
B.Are you able to
C.Can you
D.Will you

To remain on the safe side, we should not take things for granted and should be able to cope with all kinds of contingency; in Salts, for instance, the villagers ___ for accommodating all the visitors.
A.may have been unprepared
B.need not to be prepared
C.must not be prepared
D.may be unprepared

The television isn't working. It ___ damaged during the move.
A.must 
B.must have been
C.must be
D.must have

He ___ them to promote him to manager; after all, he isn’t even a qualified engineer.
A.shouldn’t be expecting
B.needn’t have expected
C.can’t have expected      
D.wouldn’t be expecting

Ted's flight from Amsterdam took more than 11 hours. He ___ be exhausted after such a long flight.
A.can
B.must
C. had better
D.has

I've redone this math problem at least twenty times, but my answer is wrong according to the answer key. The answer in the book ___ be wrong!
A.should
B. have to      
C.must 
D.could