Remember that there is still one point we must make clear at the conference tomorrow. A.

问题补充：

Remember that there is still one point we must make clear at the conference tomorrow.

A. where

B. why

C. when

D. that

答案：

A. where

B. why

C. when

(答案→)D. that

解析：此题考察定语从句。point 在从句 we must make clear at the conference tomorrow. 中作 make的宾语，所以答案D。