-- beautiful music it is!--Yes it’s very popular among young people.A. What a butB. Wha

问题补充：

-- beautiful music it is!

--Yes, it’s very popular among young people.

A. What a, but

B. What, so

C. How a, or

D. How and

答案：

A. What a, but

(答案→)B. What, so

C. How a, or

D. How and

解析：本题考查的是what引导的感叹句，其结构为what +adj+n（U）+主+谓！

又根据下文的答语内容，故选答案为B