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 |
A.ought to | B.can | C.will | D.might |
A.couldn’t | B.mustn’t | C.shouldn’t | D.oughtn’t |
A.was writing | B.would write | C.had written | D.has been writing |
A.needn"t | B.shouldn"t | C.mustn"t | D.can"t |
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