基本信息
21. Air pollution in big cities will be _____ less serious problem if _____ bike becomes ______ popular means of transportation.
A. a; the; a B. 不填；a; the
C. the; the; a D. a; a; 不填
22. -Would you like some more noodles?
-No, thanks, I am full.
-_______
A. Really?B. Are you serious!
C. Are you sure?D. Dont be shy, just have more!
23. Various plans have been drafted by the Beijing government for possible changes and emergencies to _____ a smooth torch relay in the rain.
A. ensureB. requireC. undertakeD. recommend
24. It is reported that there is no effective vaccine available worldwide to kill the EV 71, _____ has caused many cases of hand-foot-mouth disease.
A. that B. a virus that C. the virus D. what
25. The prices of pirated (盗版) DVDs are lower because they take advantage of others _____ ideas without paying for the right to do so.
A. early B. special C. precious D. original
