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They must have finished the work, ?A.mustn’t theyB.haven’t theyC.hadn’t theyD.di

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They must have finished the work, ?A.mustn’t theyB.haven’t theyC.hadn’t theyD.di

They must have finished the work, ______?

A.mustn’t they

B.haven’t they

C.hadn’t they

D.didn’t they

试题答案

B