2. 外语
  3. _______________________(她肯定没有收到我的来信)，otherwise she would have replied before now．

_______________________(她肯定没有收到我的来信)，otherwise she would have replied before now．

admin2009-04-23  86
问题 _______________________(她肯定没有收到我的来信)，otherwise she would have replied before now．
选项
答案She couldn’t have received my letter
解析 考查点：情态动词+完成式表推测。根据题干中的虚拟语气可知是过去时间。对过去进行推测可用 must have done表肯定的推测，或couldn’t have done表否定的推测。
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大学英语六级

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