21. We have every reason to believe that ______ 2008 Beijing Olympic Games will be ______ success.
A. /; a B. the; / C. the; a D. a; a
22. It is the second time that I in Hainan. What great changes have taken place in Hainan!
It is ten years since I it last time.
A. have been; left B. had been; left C. have gone; had left D. went; had left
23. One day while walking along the bank of a lake, the girl to see 20 eggs laid by a wild goose.
A. managed B. attempted C. happened D. Supposed
