第二部分：英语知识运用（共两节, 满分35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涂黑。
21．Mr. Smith’s decision to attend ceremony tomorrow can be seen as gesture of his intention to improve the relationship.
A．the, a, the B．a, a, the C．the, the, a D．a, the, a
22．At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions it was too late.
A．when B．after C．until D．before
