All the people in the nation can remember exactly how many years ago the civil war broke

问题补充：

All the people in the nation can remember exactly how many years ago the civil war broke out.

A. was it that

B. it was when

C. it was that

D. was it when

答案：

A. was it that

B. it was when

(答案→)C. it was that

D. was it when

解析：考查强调句型。remember后是一个宾语从句，宾语从句是一个特殊疑问句的强调句型，应用陈述句语序，句意：在这个国家所有的人都确切的记得究竟是多少年前内战发生了。所以选C。