Using passive voice: We have not heard of him since then.

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问题 Using passive voice:
We have not heard of him since then.

选项

答案He hasn’t been heard of since then．

解析译文：自那以后我们就没有他的消息了。现在完成体变被动态时，要用have been done。本题动作发出者是we，变被动态时可以不提；动作接受者是him，变被动态时作句子主语，且要用主格形式。

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