问题补充：
The reason so many people are crazy about Gangnum Style is it’s good for bodybuilding, and it brings people a lot of fun.
A. /; that
B. that; because
C. why; because
D. why; that
答案：
A. /; that
B. that; because
C. why; because
(答案→)D. why; that
解析：考查定语从句和表语从句。本题第一空why引导的定语从句，对先行词the reason进行修饰限制。第二空是固定句式The reason is that…原因是…；that引导的是一个表语从句，that在句中不充当任何成分，只起引导作用。句意：如此多的人对江南style感兴趣的原因是这首歌对于健身很好，而且它给人带来了很多的快乐。故D正确。
