第二部分：英语知识运用（共两节, 满分45分）
第一节 单项填空（共15小题; 每小题1分, 满分15分）
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. -- Shall I lock the lab now before I go home？
-- ______. I’ll check it myself later.
A. Go ahead B. No problem C. No hurry D. Don’’t bother
22. There is a saying ______ swimming is a good way to keep fit.
A. which B. what C. that D. where
23. We spent 16 wonderful days in August ______ the athletes’ joys and tears in 2008 Beijing Olympic Games.
A. sharing B. to share C. shared D. share
