I decide which one to buy.为什么要用which one to buy?而不用which to buy?谢谢.

问题描述:

I decide which one to buy.为什么要用which one to buy?而不用which to buy?谢谢.
I decide which one to buy.
为什么要用which one to buy?
而不用which to buy?谢谢.

which这个代词只可以用this,that这样的词回答,换句话说,如果用which提问的话,就用this,that回答,如果用which one提问的话,就用this one,that one 回答.这里显然要用this one,that one,the blue one,the red one等来...