题目内容
【题目】The new suspension bridge __________ by the end of last month.
A. has been designed B. had been designed
C. was designed D. would be designed
【答案】B
【解析】句意:这座新悬索桥在上月底才设计好。by the end of last month为过去完成时的时间状语,用过去完成时。
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