is where he gets all his money from. A. What I can’t understand itB. That I can’t underst

问题补充：

is where he gets all his money from.

A. What I can’t understand it

B. That I can’t understand

C. What I can’t understand

D. Which I can’t understand it

答案：

A. What I can’t understand it

B. That I can’t understand

(答案→)C. What I can’t understand

D. Which I can’t understand it

解析：考查名词性从句。此题为主语从句，应用陈述句语序，句意：我不理解的就是他从哪里得到的他所有的钱。understand 后缺少宾语，所以用what,故选C。