A.couldn’t | B.mustn’t | C.needn’t | D.shouldn’t |
A.will be | B.would have been | C.is | D.would be |
A.would | B.should | C.could | D.might |
A.Might | B.Would | C.Can | D.Shall |
A.must have killed | B.can have killed |
C.should have killed | D.might have killed |
A.do | B.did | C.doing | D.done |
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