A.should kill | B.might kill | C.must have killed | D.could have killed |
A.may | B.should | C.can | D.must |
A.will | B.must | C.may | D.shall |
A.mustn’t | B.may not | C.won’t | D.needn’t |
A.must have gone | B.shouldn’t have gone |
C.could have gone | D.couldn’t have gone |
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