Have you written a letter to you mather ? I wrote _____ yesterday_英语解答

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/

人气：120 ℃　时间：2020-03-21 04:36:42

解答

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