We were swimming in the lakeAsuddenly the storm started.AwhenB．whileC．untilD．before

发布时间：2020-08-16 22:59:10

We were swimming in the lake A suddenly the storm started.A．whenB．whileC．untilD．before

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解析：考察固定句型。Be doing sth when…正在做某事在这时…结合句意可知A正确。句意：我们正在湖里游泳在这时突然开始下暴雨。

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