Listening to loud music at rock concerts

天天题库2019-12-17  4

问题 Listening to loud music at rock concerts __________caused hearing loss in some teenagers.

选项 A.isB.areC.hasD.have

答案C

解析考查主谓一致。动名词作主语,句子的谓语动词用单数形式,由此排除B、D两项,根据主句与caused的主动关系,排除A项。故选C。
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