Three quarters of some children’s spare time wasted watching TV －that can explain why they

问题补充：

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：

A. are

(答案→)B. is

C. being

D. /

解析：考查主谓一致：主语是分数，百分数修饰的时候，谓语要和后面的名词决定，这句话的主语是Three quarters of some children’s spare time，可知谓语是单数，句意：一些孩子的空闲时间被浪费来看电视—这可以解释他们为什么懒惰的原因。选B。