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

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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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