题目内容
【题目】
The report aims to explain how these conclusions ______.
A. were reached
B. had been reached
C. have reached
D. had reached
【答案】A
【解析】这篇报告的目的是解释如何得出这些结论的。结论已经形成,因此使用一般过去时,conclusions 和reach之间是被动关系,因此用一般过去时的被动语态。故答案选A。
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