第二部分 英语知识运用（共两节, 满分45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。
21. I take a taxi and arrived at _______ railway station just in time to see______ professor off.
A. a, the B. the, a C. a, a D. the, the
22. —They might stay for dinner. Please go to the supermarket and buy some food.
— ________ .
A. Yes, take it easy B. Well, it just depends
C. Ok, just in case D. All right, you’re welcome
