A.do you work, you can | B.you work ,you can |
C.do you work , can you | D.you work, canyou |
A.should | B.must | C.will | D.need |
A.should have tried | B.must have tried |
C.might have tried | D.needn’t have tried |
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 |
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