23. Mary was studying in her room ______ she heard a woman screaming.

　　 A. as　　　　 B. when　　　　 C. while　　　　 D. until　

22. John Janson’s ______ first aid skills saved Ann Slade’s life, which shows ______ knowledge of first aid really matters.

A. /; /　　　 B. a; the　　　　 C. the; a　　　　　 D. /; a

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.-I’m afraid I’ve lost your e-mail address.

-Well, ______, I can easily write you another one.

A. never mind　 B. that’s right　　 C. you’re careless　 D. don’t say sorry