问题

We _______ pay to get into the concert. It’s free.
A:can't
B:mustn't
C:might not
D:don't have to;
B:mustn't
C:might not
D:don't have to;
正确答案是:
同类题型
I can ____the house being untidy, but I hate it if it’s not clean.
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Who won the election for mayor —A man _____ to represent every minority group in the city.
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If you can’t _____ a better plan, we have to carry out the present one.