Only one copy left. Would you like to have _______, sir? A one B this C that Dit 这题为什么选D

问题描述:

Only one copy left. Would you like to have _______, sir? A one B this C that Dit 这题为什么选D
求解释什么时候用it 什么时候用one 仔细解释啊

it 代替前面提到的‘ 仅仅剩下的那册’
分析:ONE 代替同类事物
如 Your pen is nice.Where did you buy it I want to buy one .it都用在什么时候代替前面提到的东西呀。请认真看我的例子!