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. Jack is honest man and we all find it pleasure working with him.
A. a; / B. an; / C. a; a D. an; a
22. Excuse me, but could you tell me ? I’d like to drop him a line.
A. where is his address B. where his address is C. what his address is D. what is his address
