I shall never forget the days I spent in Beijing University has a great effect on my life

问题补充：

I shall never forget the days I spent in Beijing University, has a great effect on my life.

A. that; which

B. which; that

C. when; that

D. when; which

答案：

(答案→)A. that; which

B. which; that

C. when; that

D. when; which

解析： 考查定语从句。第一空，先行词为the days，从句中I spent 后缺少宾语，故用关系代词that/which ,第二空是非限制性定语从句，which 在从句中做主语，指前半句话的含义，所以选A。