He his homework at 9 o’clock yesterday .A. does B. was doing C. did

发布时间：2020-08-21 02:12:06

He      his homework at 9 o’clock yesterday .
A. does       B. was doing      C. did

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解析：do one’s homework是固定短语，因其主语是he，第三人称单数故其谓语动词要用第三人称单数。
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