第二部分：（满分45分）
第一节：单项选择：（共15分，每小题1分）
21. ____ is known to us all, ____ water and air are harmful to people’s health.
A. That; polluting B. Which; being polluted
C. As; polluted D. It; to pollute
22. Great changes ______ in the past few years, and a lot of factories ________.
A. had taken place; have been set up B. have taken place; have been set up
C. took place; have set up D. were taken place; were set up
23. –What do you think of Nanchang?
－Nowhere else _____ such beautiful scenery.
A. could one find B. one could find C. found one D. one found
24. ______ the present unemployment continue, the society would face a more troublesome situation.
A. Would B. Should C. Might D. Could
25. Exciting as its special effects are _______, there is too much violence in the film.
