The reason Peng Liyuan is widely discussed recently is she is seen as the most beautiful first lady in China.
A. Why; because
B. That; that
C. Why; that
D. why; why
网友回答
A. Why; because
B. That; that
(答案→)C. Why; that
D. why; why
解析：本题第一空是一个定语从句，先行词是the reason，后面定语从句的句子结构很完整，所以使用关系副词why引导起这个定语从句，并在句中做状语。第二空考察的是that引导的表语从句，that在句中不充当任何成分，只是一个引导词而已。句义：最近彭丽媛被广泛讨论的原因是她被认为是中国最漂亮的第一夫人。故C正确。