第二部分英语知识运用（共两节，满分45分）
第一节 单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项,并在答题卡上将该项黑。
21. __________strong earthquake struck __________ Yaan, Sichuan province on April 20, 2013.
A. A; / B. The; the C. The; a D. A; the
22. Students ___________ remain in their seats until all the papers have been collected.
A. may B. shall C. need D. can
23. — What do you think of modem music?
— It is often considered not as good as ___________ of the past.
A. it B. this C. that D. one
24. I think it a great honor ___________ to visit your country.
A. to invite B. inviting C. having invited D. to be invited
