第二部分：英语知识运用（共两节，满分35分）
第一节 语法和词汇知识 （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涂黑。
例: It is generally considered unwise to give a child he or she wants.
A．however B．whatever C．whichever D．whenever
答案是B。
21．If we expect much cleaner world, we should attract world's attention to protect it.
A．a; a B．a; 不填 C．a; the D．the; 不填
22．People were not allowed to enter the reading room because it .
A．had been painted B．was being painted
C．was painting D．painted
