It’s exactly we do has changed the world.A. which; thatB. how; thatC. how; whatD. what;

问题补充：

It’s exactly we do has changed the world.

A. which; that

B. how; that

C. how; what

D. what; that

答案：

A. which; that

B. how; that

C. how; what

(答案→)D. what; that

解析：考查强调句型和主语从句。本题第一空what引导的是主语从句what we do；在句中what作为动词do的宾语。第二空的that与前面的it is构成强调句型。句意：正是我们所做的事情改变了整个世界。故D正确。