—What do you think of the concert given by the famous Hong Kong singer?—Not so goodIn fac

问题补充：

—What do you think of the concert given by the famous Hong Kong singer?

—Not so good．In fact, it to be a great disappointment.

A. turned up

B. turned in

C. turned down

D. turned out

答案：

A. turned up

B. turned in

C. turned down

(答案→)D. turned out

解析：

turn out to be表示“结果是，证明是”。turn up出现；露面；turn in上交；出卖；turn down拒绝；调低（声音）。