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【题目】He promised _____ back in a few minutes.

A.to ring B.ringing C.rang D.to be ringing

【答案】A

【解析】

试题分析:考查固定短语。promise+to do sth.为固定短语,意为答应干某事,句意:他答应几分钟后打电话来。故选A

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