题目内容
【题目】It was the fourth time that Tom _____ in the maths exam.
A. failed B. had failed
C. have failed D. has failed
【答案】B
【解析】试题分析:句意:这是Tom第四次数学考试失败。此处是“某人第几次干什么”,It is∕was+序数词+that从句。如果是is从句用现在完成时;如果是was从句用过去完成时。此处要用过去完成时,故选B.
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