The workers finished mending the road this month. A. inB. byC. atD. on

问题补充：

The workers finished mending the road this month.

A. in

B. by

C. at

D. on

答案：

A. in

(答案→)B. by

C. at

D. on

解析：句意：到本月为止，工人们完成了修路。分析介词用法：in接年、月、季节或段时间（常用将来时）；by接时间表示：到……为止；at 接点时间；on接时间表示具体某一天。故选B

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