A.don’t have to | B.mustn’t | C.cannot | D.shouldn"t |
A.not smoke | B.don’ t smoke | C.doesn’t smoke | D.no smoke |
A.must be | B.should be | C.must have been | D.should have been |
A.Does | B.Shall | C.May | D.Will |
A. shall | B.must | C.may | D.can |
A.held; was interested | B.hold; was interested |
C.should hold ; be interested | D.should hold ; interested |
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