A.might | B.would | C.could | D.should |
A.am | B.were | C.had been | D.would be |
A.must be | B.must have been | C.must live | D.must have lived in |
A.ought not to | B.can’ t | C.don’ t have to | D.mustn’ t |
A.must | B.ought to | C.might | D.could |
A.not allow | B.do not allow | C.mustn’t allow | D.couldn’t allow |
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