24.Even the top students in our class work out the maths problem, so it be difficult.A.can't, must B.can't, need C.can, may D.mustn't, can 查看更多

 

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Even the top students in our class        work out the maths problem , so it        be difficult.

A.can ' t, must      B.can ' t, need                  C.can, may                D.mustn't, can

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