______ a reply, he decided to write another letter.

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问题 ______ a reply, he decided to write another letter.

选项 A、Not receiving
B、Having not received
C、Not having received
D、Receiving not

答案C

解析 因为没有收到回复,他决定再写一封信。“完成式”的分词表示“比谓语早的动作”(=As he had not received... )。
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