I can't decide _________.A what to buy B which to buy

问题描述:

I can't decide _________.A what to buy B which to buy

B which to buy

A. what to buy
which to buy 只有在这个句子有前缀句如:amongs those two, i cant decide which ONE to buy.
which one to buy 有听过,which to buy 没听过

这题不完整,买什么,选择A,买哪个,选择B.