________iswellknowntoeveryone,the

发布时间：2020-07-27 03:16:43

________ is well known to everyone, the Olympic Games ________ every four years．A.It; are heldB.As; take placeC.That; happenD.This; break out

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B解析前一空as为关系代词，引导非限制性定语从句，后一空A、B两项都是正确的，若选A项则应将句中逗号改成that才对。
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