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，并在答题卡将该项涂黑。
21. If we attract _____ world’s attention to protecting the environment , ____ much cleaner world can be expected.
A. the; the B. a; / C. /; a D. the; a
22 . In front of the teaching buildings stands an outstanding , which says “ Welcome to No. 1 Middle School”
A. sign B. signal C. mark D. symbol
23.---How come the tragedy should have happened on such a broad road?
--- I guess that the driver ______too careless then.
A. has been B. is C. was D .had been
24. We Chinese people wish _____ no war in the world in the future, but that never means we fear any war
