23. The medicine is supposed to cure this disease, but I'm not sure it _______.

　　 A. does　　　　　 B. was　　　　　　 C. has　　　　　　　　 D. is

22. --Was Tom in the lab when you arrived there?

　　 --Yes, but he _______ soon afterwards.

　　　 A. had left　　　 B. left　　　　　　 C. would leave　　　　 D. has left

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，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。

21. --Bruce was killed in a traffic accident.

　　 -- _______ I talked with him only yesterday!

　　 A. Is that right?　　　　　　　　　　 B. I beg your pardon?

　　 C. I see.　　　　　　　　　　　　　　　 D. Oh, no!