We didn;t hear from his letter for a long time.这题怎么改错,为什么?
问题描述：
We didn;t hear from his letter for a long time.这题怎么改错,为什么?
答
didn't改为haven't,把his letter改为him更好。
答
we haven't heard
答
We didn't hear from him for a long time.
听说的是“他”不是他的信
答
We (have not heard) from.............