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  3. Using a proper modal auxiliary: Perhaps he was working for Simons.

Using a proper modal auxiliary: Perhaps he was working for Simons.

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问题 Using a proper modal auxiliary:
Perhaps he was working for Simons.
选项
答案He may have been working for Simon．
解析 perhaps表示“可能”，可以选用情态助动词may代替。另外时态上可以使用现在完成进行体，表示一种从过去开始一直持续到现在的状态，比较符合句意。
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