23. --- Do you think we should accept that offer?

　 --- Yes, we should, for we ____ such bad luck up till now, and time ____ out.

　　 A. have had; is running　　　　　 　　 B. had; is running

　　 C. have; has been run　　　　　　 　　 D. are having; runs

22. Mr. Herre is the one of many experts ____ in our factory.

A. that is　　　　　 B. that are　　　　 C. which is　　　　　 D. which are

第一节　 　单项选择(共15小题；每题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. Such ____ medical equipment is in ____ danger of breaking down, if not taken good care　　

　 of.

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