2. 外语
  3. My brother met her at the Grand Theater yesterday afternoon, so she ______ your lecture.

My brother met her at the Grand Theater yesterday afternoon, so she ______ your lecture.

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问题 My brother met her at the Grand Theater yesterday afternoon, so she ______ your lecture.
选项 A、mustn’t have attended
B、needn’t have attended
C、shouldn’t have attended
D、couldn’t have attended
答案D
解析 该句前半部分叙说一个客观事实，后句对前句进行补充说明。must have done表示对过去动作的肯定推测，只能用于肯定句中，其否定形式是can’t／couldn’t have done，因此A是错误的，答案为D。B、C两项分别表示“过去本来没有必要、不应该做某事，但事实上却做了”，不符合题意。
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