21. I’m not sure whether I can gain any profit from the investment, so I can’t make a(n) ______ promise to help you.
　　A. exact B. defined C. definite D. sure
　　22. A healthy life is frequently thought to be ______ with the open countryside and homegrown food.
　　A. tied B. bound C. involved D. associated
　　23. Features such as height, weight, and skin color ______ from individual to individual and from face to face.
　　A. change B. vary C. alter D. convert
　　24. It has been revealed that some government leaders ______ their authority and position to get illegal profits for themselves.
　　A. employ B. take C. abuse D. overlook
　　25. Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first ______.
　　A. intention B. attempt C. purpose D. desire
　　25. Writing is a slow process, requiring ______ thought, time, and effort.
　　A. significant B. considerable C. enormous D. numerous
　　26. Lightning is a ______ of electrical current from a cloud to the ground or from one cloud to another.
　　A. rush B. rainbow C. rack D. ribbon
　　27. New York ______ second in the production of apples, producing 850,000,000 pounds this year.
　　A. ranked B. occupied C. arranged D. classified
　　28. I caught a ______ of the taxi before it disappeared around the corner of the street.
　　A. vision B. glimpse C. look D. scene
　　29. Students or teachers can participate in excursions to lovely beaches around the island at regular ______.
　　A. gaps B. rate C. length D. intervals
　　30. Physics is ______ to the science which was called natural philosophy in history.
　　A. alike B. equivalent C. likely D. uniform

　　31. The president made a ______ speech at the opening ceremony of the sports meeting, which encouraged the sportsmen greatly.
　　A. vigorous B. tedious C. flat D. harsh
　　32. The strong storm did a lot of damage to the coastal villages: several fishing boats were ______ and many houses collapsed.
　　A. wrecked B. spoiled C. torn D. injured
　　33. The manager lost his ______ just because his secretary was ten minutes late.
　　A. mood B. temper C. mind D. passion
　　34. Please be careful when you are drinking coffee in case you ______ the new carpet.
　　A. crash B. pollute C. spot D. stain
　　35. Convenience foods which are already prepared for cooking are ______ in grocery stores.
　　A. ready B. approachable C. probable D. available
　　36. Some old people don’t like pop songs because they can’t ______ so much noise.
　　A. resist B. sustain C. tolerate D. undergo
　　37. You can not be ______ careful when you drive a car.
　　A. very B. so C. too D. enough
　　38. Housewives who do not go out to work often feel they are not working to their full ______.
　　A. capacity B. strength C. length D. possibility
　　39. He’s watching TV? He’s ______ to be cleaning his room.
　　A. known B. supposed C. regarded D. considered
　　40. The old couple decided to ______ a boy and a girl though they had three children of their own.
　　A. adapt B. bring C. receive D. adopt

　　41. The government is trying to do something to ______ better understanding between the two countries.
　　A. raise B. promote C. heighten D. increase
　　42. The newspaper did not mention the ______ of the damage caused by the fire.
　　A. range B. level C. extent D. quantity
　　43. The soldier was ______ of running away when the enemy attacked.
　　A. scolded B. charged C. accused D. punished
　　44. The newcomers found it impossible to ______ themselves to the climate sufficiently to make permanent homes in the new country.
　　A. suit B. adapt C. regulate D. coordinate
　　45. A ______ to this problem is expected to be found before long.
　　A. result B. response C. settlement D. solution
　　46. You have nothing to ______ by refusing to listen to our advice.
　　A. gain B. grasp C. seize D. earn
　　47. As a result of careless washing, the jacket ______ to a child’s size.
　　A. compressed B. shrank C. dropped D. decreased
　　48. He hoped the firm would ______ him to the Paris branch.
　　A. exchange B. transmit C. transfer D. remove
　　49. The relationship between employers and employees has been studied ______.
　　A. originally B. extremely C. violently D. intensively
　　50. She was complaining that the doctor was ______ too much for the treatment he was giving her.
　　A. expending B. offering C. costing D. charging