21. “2012”, ________ disaster film directed by Roland Emmerich, is so attractive that I want to see it ________ second time.
A. the; the B. a; a C. a; the D. 不填; a
22.—I don’t know why Tom was absent from yesterday’s meeting.
—He must have been sick, _________?
A. isn’t he B. wasn’t he C. didn’t he D. mustn’t he
23. The WHO gave a warning to the public without any ________ when the virus of H1N1 hit Mexico in April, 2009.
A. response B. judgment C. delay D. discouragement
24.—Excuse me, which of these buses shall I take to the People’s Hospital?
—_________ one as you please.
A. Each B. Either C. Every D. Any
