I am sorry I can't hear______.

问题描述:

I am sorry I can't hear______.
A how he is doing
B what he is saying
C what is he saying
D how is he doing

B
肯定句:主句+(that)+句子的肯定形式
一般疑问句:主句+if+句子的肯定形式
特殊疑问句:主句+特殊疑问词+句子的肯定形式