【题目】—What did 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
在线课程【答案】D
【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）。