I can’t hear you are talking about .Please speak a little louder.A. whatB. whyC. whichD. w

问题补充：

I can’t hear you are talking about .Please speak a little louder.

A. what

B. why

C. which

D. when

答案：

(答案→)A. what

B. why

C. which

D. when

解析：本题需要的是能作宾语的特殊疑问词，因而BD排除掉，根据句意，可知选A