I don’t know the reason you were late for the meeting but I’m sure someone will tell me y

问题补充：

I don’t know the reason you were late for the meeting, but I’m sure someone will tell me you don’t want to explain.

A. why; that

B. why; what

C. for which; which

D. for which; that

答案：

A. why; that

(答案→)B. why; what

C. for which; which

D. for which; that

解析： 第一空，考查定语从句，先行词为the reason，从句中缺少原因状语，所以用why/for which，第二空考查名词性从句中的宾语从句，explain 后缺少宾语，所以用what，故选B。