Listening to loud music at rock concerts

练习题库2022-08-02  18

问题 Listening to loud music at rock concerts__________caused hearing toss in some teenagers.A.isB.areC.hasD.have

选项 A.is
B.are
C.has
D.have

答案 C

解析 Listening to…是动名词短语作主语,故谓语动词用单数,根据caused可知用现在完成时的单数形式。
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