从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．—What did you think of the concert given by the band?
—Excellent! In fact, it ________ to be a great success.
A. looked up B. turned in C. looked down D. turned out
22．Harry’s ________ to the problem is to make a list of all the pros and cons.
A. approach B. access C. response D. attitude
23．He kept talking all alone and wasn’t ________ of having hurt her feelings.
A. informed B. content C. conscious D. patient
