A. throat B. thrust C. trust D. thread 标准答案：B
24. Before you mail this letter, you should check again whether you have（ ）it or not. A. sunk B. sighed C. sought D. sealed 标准答案：D
25. To some _______, Mary still does not understand this unit. But she herself does not believe so. A. extend B. part C. extent D. content 标准答案：C
26. My throat is _______. I cannot speak any more. A. sore B. purchase C. glow D. faint 标准答案：A
27. As a commander, you should not（ ）the soldiers to unnecessary danger. A. express B. explode C. exploit
D. expose 标准答案：D
28. His speech _______ the young people to continue their study. A. glanced B. delayed C. inspired D. created 标准答案：C
29. If you want to see the chairman of the department, you’d better make an（ ）with his secretary first. A. admission B. agreement C. appointment D. alphabet 标准答案：C
30. He checked carefully to（ ）the possible errors in his design. A. eliminate B. exceed C. enlarge D. vibrate 标准答案：A
31. This is not what we asked you to do. You can not get more pay for the _______ work. A. owing B. device C. tired D. extra 标准答案：D
32. The Foreign Minister made an excellent（ ）on the current international situation. A. committee B. command C. comment D. commission 标准答案：C
33. His speech（ ）the young people to continue their study. A. glanced B. delayed C. inspired D. created 标准答案：C
34. We（ ）that it will take another four months to finish this plan. A. grant B. estimate C. council D. check 标准答案：B
35. Metals expand when they are heated and（ ）when cooled. A. indicate B. eliminate C. conquer D. contract 标准答案：D
36. Metals expand when they are heated and _______ when cooled. A. indicate B. eliminate
C. conquer D. contract 标准答案：D
37. Please do not（ ）when somebody else is talking. A. intend B. interpret C. interrupt D. invest 标准答案：C
38. I feel _______ to say that I can not believe what he said. A. wanted B. observed C. obliged D. wandered 标准答案：D
39. If your letter is over weight, you must pay for the（ ）. A. excess B. exceed C. checked D. chased 标准答案：A
40. Our nerghbors gave _____ a baby bird yesterday that hurt ______ when it fell from its nest. A. us,it B. us,itself C. ourselves, itself D. ourselves, it 标准答案：B
41. Before he left the White House, the President made a _______ speech.
A. quaarel B. symbol C. automobile D. farewell 标准答案：D
42. If your letter is over weight, you must pay for the _______. A. excess B. exceed C. checked D. chased 标准答案：A
43. This is an _______ that will not be easily forgotten. A. impact B. academic C. insult D. alternative 标准答案：C
44. There is too much noise outside. I can not _______my attention on my work. A. connect B. flat C. fill
D. concentrate 标准答案：D
45. The international situation is very _______ in the Middle East. A. delicious B. perfect C. delicate D. percent 标准答案：C