1.No one knows___
问题描述：
1.No one knows___
A.what he is writing about
B.whose he writing to
C.whom he is writing
D.that he is writing with
答
No one knows （A、what he is writing about）.没人知道他正在写什么.括号中填的部分是个宾语从句.其他三项都有问题,具体分析如下---B.whose he writing to：疑问词错,应该是who（whom）.C.whom he is writing：不...