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l5小题；每小题l分，满分l5分）
从A、B、C、D四个选项中，选出可以填人空白处的最佳选项，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． World Expo is regarded as the Olympic Games of the economy, science and technology, _____ expert said．
A．A; an B．The; an C．The; a D．A; the
