A.mustn’t | B.can’t | C.may not | D.don’t have to |
A.should get up | B.should have studied |
C.must have studied | D.should have got up |
A.mustn’t | B.can’t | C.don’t have to | D.had better not |
A.can | B.should | C.might | D.need |
A.mustn’t | B.needn’t | C.can’t | D.may not |
A.could do | B.should do | C.might have done | D.would do |
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