第二部分：英语知识运用（共两节, 满分55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。答案涂在答题卡上。
21．— I hear that Mary won the prize of the physics contest．
—______ She was not interested in it at all．
A．So what? B．Why not? C．You're kidding! D．I think so．
22．While ______ peace — keeping is the UN' s main duty, it also has programs for ______ education, better health and business in the world．
A．the;an B．不填;the C．不填;an D．不填;不填
