WithHalloweenapproaching,thereexistsarealconcernamongparentsandteachers

发布时间：2020-08-14 13:44:23

With Halloween approaching, there exists a real concern among parents and teachers __________ trick or treating will bee a seriously anti-social activityA.whetherB.whatC.thatD.how

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C解析考查名词性从句。句中that解释说明名词concern顾虑，担心，根据句意选C。
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