—Somanypeoplethere!Whathappened?—Agroupofyoungpeoplefoughtthere.Thepolic

发布时间：2020-08-14 02:16:17

—So many people there!What happened?—A group of young people fought there.The police arrived,after             the situation ee calmerA.thatB.whichC.whenD.then

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B解析which 为非限定性定语从句的引导词，指代“the police arrived”这件事。
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