15. _______I failed in English a third time, I had no doubt about my

　 gift for foreign languages.

　A. By the time　　　 B. Unless　　　　 C. After　　 D. Until

14. --How did you get on in your final exam?

--I have no idea. The papers _______.

A. are being marked　　　　　　　　　 B. would be marked　

C. have been marked　 　　　　　　　　D. had been marked

13. --There are a dozen pens in this house, but I can hardly find

　one now.

　 　--Keep looking. 　　　　is sure to turn up.

A. One　　　　 B. It　　　 　C. That　　　 　D. This

12. Early in April this year some experts indicated that H1N1 would

　　　　 this winter.

　　 A. break down　　 B. break out　　 C. break up　　 D. break off

11. The course will give a general introduction. _________, it also

　provides practical experience.

　　 A. In fact　　　 B. Above all　　 C. Apart from　　　 D. In addition

10. In dealing with public relations, we should make every effort to prevent the ________in personality.

　　 A. contact　 　 B. contrast　　 C. connection　 　 D. conflict

9．________, the forest fire would have been discovered much earlier．

　 A．But for their care　　　　　 　 B．If they were careful

　 C．Without their care　　　　　 D．Had they been more careful

8. During the reconstruction of the city, many modern tall buildings

　 went up ________ old shabby houses were torn down.

　 A. that　　　　 B. where　　　　 　　C. when　　　 D. what