2. 外语
  3. I______to him because he phoned me shortly afterwards.

I______to him because he phoned me shortly afterwards.

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问题 I______to him because he phoned me shortly afterwards.
选项 A、need not to have written
B、needn’t have written
C、needn’t having written
D、need haven’t written
答案B
解析 情态动词题。needn’t have done意为“其实没有必要做……”。因此，[B]为正确答案。
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