33. The ship which hit on a large rock　 _______ the southeast coast was made in a ship-building factory _____ the coast.

　 A. off; off　 B. on; on　 C. off; on　　 D. on; off

32. I didn’t accept the job, not that I am unwilling to do it, ______ that I am unable to.

　 A. so　 B. but　　 C. however　　 D. though

31. He realized his mistakes and took measures to reduce the loss _____ it was too late.

　 A. until　 B. when　　 C. before　 D. as

30. It was the early 2000s ______ mobile phones were widely used in China, __________ it was considered the patent of the rich.

　 A. that; in which　 B. when; before which　 C. that; after which　 D. when; in where

29. –The plane is due to take off at 7:50 from the airport. ______ we fail to arrive there in time?

　 --Try to take another flight then.’

　 A. What if　　 B. As if　　 C. Even if　 D. Only if

28. Had they been warned of the possible danger, they ______.

　 A. may have escaped　 B. could have escaped　 C. must have escaped　 D. can have escaped

27. As the famous expert ______, the secret _____happiness is to think about positive things and stay optimistic.

　 A. retells; on　　 B. reminds; to　 C. remarks; of　　 D. respects; in

26. –Who is singing and dancing in the gym now?

　 --_______ the students from the art department.

A. They are　 B. It is　　 C. There are　 D. That is

25. _______, and the Iraqis can get real peace.

　 A. If the American soldiers leave Iraq.　　　　 B. Driving the American soldiers out of Iraq.

　 C. Drive the American soldiers out of Iraq.　　 D. The American soldiers leave Iraq.

24. –Must I do the math exercise step by step?

　 --Of course. You can never be _______careful with that.

　 A. too　　 B. enough　 C. so　　 D. very