It was 300 hundred years ago this historic temple was built by a wealthy Mandarin.A. sinc

问题补充：

It was 300 hundred years ago this historic temple was built by a wealthy Mandarin.

A. since

B. when

C. that

D. before

答案：

A. since

B. when

(答案→)C. that

D. before

解析：考查强调句：句意：就是在300年前，这个有历史意义的庙由一个有钱的满清的官吏建造。强调句的结构是：It is /was+强调部分+that+其余部分，判断是否是强调句的方法是：去掉强调结构，如果这句话仍然成立，就是强调句，所以选C。