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。
21．You can browse the duty free shops while ______ for your flight．
A．wait B．waited C．waiting D．are wait
22．Have you _____ your things, Bob? The train is leaving at 2:30 this afternoon, so we don’t have too much time．
A．added up B．hidden away
C．set down D．packed up
23．His whole school education _____ only 2 years because of his illness．
A．adde d up B．added up to
C．added to D．was added up to
24．—What’s the matter with you, Sandy?
