11. ______, the more likely you may come to a right solution.

A. You more thoroughly consider a problem

B. Most thoroughly a problem you consider

C. The most thoroughly you consider a problem

D. The more thoroughly you consider a problem

12. Doctors recommend that everyone exercise every day, particularly those who spend many hours ______ sedentary work.

A. to do                                                           B. doing

C. do                                                               D. done

13. If Mr. Li ______ Managing Director, the company would have been collapsed.

A. would be                                                      B. were

C. is                                                                 D. had been

14. We have till now ______ as many as 30 anti-dumping suits against foreign exporters.

A. aroused                                                        B. rose

C. raised                                                           D. risen

15. ______ you mentioned in your letter in connection with the question of agency has had our attention.

A. What                                                           B. That

C. When                                                           D. Which