12. The secretary suggested that they ____ the men in at once. A. had brought B. should have brought C. brought D. bring ...

4. He cast an important vote which made a big _____ and reversed the situation. A. progress B. security C. difference D. favor ...

22. Thanks ___ his help, we succeeded in finishing the job. A. in B. to C. of D. about ...

15. When will you arrive ____ the Beijing airport? A. at B. in C. to D. / ...

9. I promised to teach him France and he bought this book for me ____return. A. by B. in C. on D. with ...

4. A room ___ we do experiments is a lab. A. on which B. in that C. that D. where ...

21. There is ___. A. nothing interesting B. interesting nothing C. anything interesting D. interesting anything ...

16. If the project ____by the end of the year is delayed ,our unit will be fined. A. to be finished B. will be finished C. being finished D. finished ...

8. Smoking does great harm to our health. ___ ,many people smoke in Public Places. A. Therefore B. However C. Although D. No matter ...

3. ___he has time, he will come to visit his parents. A. Unless B. As long as C. As far as D. Even if ...