2. 外语
  3. You________John in the street this morning. He’s been dead for ages.

You________John in the street this morning. He’s been dead for ages.

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问题 You________John in the street this morning. He’s been dead for ages.
选项 A、mustn’t see
B、mustn’t have seen
C、couldn’t see
D、couldn’t have seen
答案D
解析 今天早上你不可能在街上看见约翰。他已经去世很多年了。情态动词题。must have done表示对过去情况肯定的推测，对过去情况否定的推测则用couldn’t have done，所以选D项。
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