I don’t know the reason you were absent from the meeting but I am sure that someone will

问题补充：

I don’t know the reason you were absent from the meeting, but I am sure that someone will tell me the reason you haven’t told me.

A. why; that

B. that; why

C. because; which

D. of which; that

答案：

(答案→)A. why; that

B. that; why

C. because; which

D. of which; that

解析：本题考查定语从句。第一空填关系副词why，在从句中作状语；第二空填关系代词that，在从句中作told的直接宾语。