--Would you please explain to me about the difference between the two phenomenon? --I’m s

问题补充：

--Would you please explain to me about the difference between the two phenomenon?

--I’m sorry, but that’s just I’m puzzled about.

A. why

B. what

C. which

D. where

答案：

A. why

(答案→)B. what

C. which

D. where

解析：可联系答.案.网客服索取。