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Why haven't you finished your homework yet? You___________ to have finished it by last Sunday.

A. are supposed          B. were supposed     C. are supposing         D. were supposing

B


解析:

本題考查的是be supposed to的用法。題意為“你為什么還沒完成作業?你上個周日就應該完成了。”在本題中be supposed to have finished相當于should have finished,意為“本來應該完成而實際上沒有”。

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