It is we do-- you and I changes the world.A. that; thatB. that; whatC. what; thatD.

问题补充：

It is we do ---- you and I changes the world.

A. that; that

B. that; what

C. what; that

D. what; what

答案：

A. that; that

B. that; what

(答案→)C. what; that

D. what; what

解析：本题考查名词性从句及强调句。what引导主语从句，在从句中作宾语，you and I 为we的同位语，that引导的为强调句。选C。