题目内容

It will take us five days to finish the difficult job.

A. at first B. at last

C. at least D. at once

C 【解析】句意:完成这个困难的工作,将会花费我们至少5天的时间。A. at first 开始; B. at last最后;C. at least至少; D. at once立刻,马上;故选C
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