第二部分：
单项填空。（共15小题，每小题1分，满分15分）
21. The exhibition is well worth ______ and you can see fancy vases of different dynasties on show there.
A. to visit B. to be visited C. being visited D. visiting
22. —Would you please let me know when the training center ______ ?
— Sometime next week.
A. will be set up B. would be set up C. has been set up D. was set up
23. —I am going to vote ______ Jackson in the next election. How about you?
—Me, too. He is the best man for the position.
A. in B. on C. against D. for
