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. —You didn’t get hurt at all in the traffic accident?
—______. I was a lucky dog.
A. No problem B. Good heavens C. I’m afraid not D. I don’t think so
22. ______ I know little about architecture, I find that building very impressive.
A. Since B. As C. If D. While
23. The food, ______ good, was soon sold out when it was taken to the market.
