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She ______ fifty or so when I first met her at a conference.A、had beenB、must be
She ______ fifty or so when I first met her at a conference.A、had beenB、must be
游客
2024-09-21
26
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问题
She ______ fifty or so when I first met her at a conference.
选项
A、had been
B、must be
C、has been
D、must have been
答案
D
解析
when引导的时间状语从句用了过去时(met),因此本句是对以往年龄或过去事实的推测,要用“must+have+过去分词”形式,故D正确。
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