— Do you know they got to know each other? — It was last year they both taught English

问题补充：

— Do you know they got to know each other?

— It was last year they both taught English in China.

A. when was it that; when

B. when it was that; that

C. when it was that; when

D. when was it that; that

答案：

A. when was it that; when

B. when it was that; that

(答案→)C. when it was that; when

D. when was it that; that

解析： 句意：你知道他们是什么时候认得彼此的吗？--是去年当时他们都在中国教英语。第一空使用了强调句的特殊疑问句，因为是宾语从句，所以语序是陈述句，排除AD，第二空填when，因为这是定语从句，先行词是last year，定语从句中缺少时间状语，所以选C。