Have you written a letter to you mather ? I wrote _____ yesterday. 是填IT还是ONEHave you written a letter to you mather ?I wrote _____ yesterday. 是填IT还是ONE/
问题描述：
Have you written a letter to you mather ? I wrote _____ yesterday. 是填IT还是ONE
Have you written a letter to you mather ?I wrote _____ yesterday. 是填IT还是ONE/
答
one
顺便说一下，你的mother写错了
答
one 我昨天写了一封
答
one
it 代替同类同物 上文提到的同一个事物,显然这里不是同一封信
one代替同类不同物