A.can’t | B.mustn’t | C.needn’t | D.wouldn’t |
A.must | B.needn’t | C.can | D.shouldn’t |
A.mustn"t; has gone | B.mustn"t; has been |
C.can"t; has gone | D.can"t; has been |
A.can | B.may | C.might | D.must |
A.must | B.can | C.need | D.should |
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