Then I have learned there are a lot of troubles in our lives but the problem is they con

问题补充：

Then I have learned there are a lot of troubles in our lives, but the problem is they control you or you control them.

A. why

B. whether

C. that

D. what

答案：

A. why

(答案→)B. whether

C. that

D. what

解析：考查名词性从句。句中whether引导表语从句，whether… or…表示“是……还是……”。句意：但问题是是他们控制你还是你控制他们。