It is none of my business. It's up to you to decide he bought yesterday is used for.A. wha

问题补充：

It is none of my business. Its up to you to decide he bought yesterday is used for.

A. what what

B. what that

C. that what

D. that which

答案：

(答案→)A. what what

B. what that

C. that what

D. that which

解析：本题考查名词性从句。decide后接宾语从句；在宾语从句中he bought yesterday又是个主语从句，缺主语故用what。在宾语从句what he bought yesterday is usedfor中for缺宾语，故还要用what。