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【题目】Three quarters of some children’s spare time wasted watching TV-that can explain why they are lazy.
A.are
B.is
C.being
D./

【答案】B
【解析】three quarters作主语时谓语动词单复数取决于of后面的名词的特征;时间time不可数,故以单数处理。句意:一些孩子课下三分之一的时间都浪费在看电视上,这可以解释他们为什么懒惰。根据句意,故选B。

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