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Don’t leave the water ____ while you brush your teeth.

A. run           B. running            C. being run     D. to run

B


解析:

非謂語動詞作賓語補足語時,選項A、D表示將來可能發生的動作;B表示賓語持續性動作,根據句意選B,表示水不停地流出。

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