fashions differ from country to country may reflect the culture difference from one aspect

问题补充：

fashions differ from country to country may reflect the culture difference from one aspect.

A. What

B. That

C. This

D. Which

答案：

A. What

(答案→)B. That

C. This

D. Which

解析：what在引导的主语从句、宾语从句、表语从句中充当句子成分，而that在引导的上述从句中不充当句子成分，只起连接作用。that引导的主语从句常可用it充当形式主语。例如：It is wellknown that Taiwan is part of China. （众所周知，台湾是中国领土不可分割的一部分。）