1. [   ] the development of human civilization, it is plain to see that human beings are easily corrupted by power.


2. [   ] the doctor’s warning, he still worked overtime to earn a living.


3. Don’t buy me a whole cake. A __ will be enough. 


4. 《Doris》: Did you sleep well last night? 《Jennifer》:No, I had an awful night. [   ] in the middle of the night, and couldn't get back to sleep.


5. Hotel guests who [   ] checking out after 1:00 P.M. should contact the front desk.


6. The pianist's performance of Franz Liszt's piano pieces was an [   ] of skill and strength.


7. 《Mary》: How much juice would you like? 《Ted》: [   ] 《Mary》: No problem. We’ve plenty.


8. China is calling for a new global currency [   ] the dominant dollar.


9. Our boss [   ] the importance of our finishing the report over the weekend, since he wanted to discuss it at the meeting on Monday morning.


10. A: Could you run over to the store? We need a few things. B: [   ] What do you want me to get? A: Well, could you pick up some sugar and a few oranges?


11. Lucy is a member of the drama club. Her dream is to become an [   ] or a singer.


12. There are two people in the office. One is John and [   ] is William.


13. We stood at different locations when the accident happened. His [   ] of the accident was very different from mine.


14. A: How do you stay fit and healthy? B: [   ]. I also try to avoid smoking and drinking too much.


15. [   ] at the back door, and they may hear you and open the door.


16. My coworkers have been working hard to [   ] a fuel shortage next summer.


17. It is often said that prevention is better than cure, so why not take some [   ] in advance?


18. The patient appreciated [   ] breakfast in bed when she wasn’t feeling well.


19. I was browsing in the library and [   ] an interesting book on traveling in Alaska.


20. The MRT system has greatly [   ] this area; I can’t even recognize the location of my old school.


21. No other girl in her class dances [   ] as she does.


22. Michelle often reviews research papers for one of the top journals in [   ] genetics.


23. Cultures [   ], so we sometimes need to adjust our behavior when we are in a new country.


24. Volcanic [   ] grounded thousands of passengers and fliers across Europe last year.


25. A [   ] of food can cause millions of people to die of hunger.


26. People who feel they must have the best of everything are rarely [   ]. It’s better to have more realistic ideas about what is important in life.


27. Not until Toyota debuted the model Prius in the late 1990s ____ the technology of hybrid engine. 


28. Our teacher always tells us that knowledge should be [   ] through years, not gained in one day.


29. A:Are you still driving to the south every week to take care of your grandmother? B: No, I’m not doing that anymore. [   ] A: Oh! I’m so sorry. Is there anything I can do to make you feel better?


30. Since Michael and I work in the same hospital, I can hardly avoid [   ] him.


31. He decided to continue the exhausting training for the Olympics, __ his physical condition was poor. 


32. The exterior of Tina's apartment has an exceptionally large [   ].


33. [   ] the lobbying groups been backing up the new protocol, but several industry labor unions are now voicing their stern support for it.


34. The UN has __ its troops from Iraq. Let’s hope that war will come to an end soon. 


35. What is an instrument which is used to see things far away?


36. Most of the     were satisfied with the annual bonus the company gave based on their job performance. 


37. The [   ] from the top of Mt. Kilimanjaro is amazing.


38. Mr. Stevenson always [   ] a sense of genuine interest in his students. No wonder his students like him so much.


39. The deadline is Friday, so we had better [   ] the report as soon as possible.


40. [   ] I did not like her at first, she ended up becoming my best friend.


41. 《Pam》:John, where are the cookies? Don’t tell me you ate them all! Again! 《John》:Yes, I did. [   ] They were so good. 《Pam》: I thought you didn’t like cookies. 《John》: Well, I don’t like cookies flavored with chocolate at all. But vanilla is different. I love them to death.


42. The manager insists that the door [   ] locked at night.


43. I remember [   ] the movie with Tom last year. It is very good.


44. A: Is the treasurer in his office every day? B:Oh yes. [   ] he must sign all checks, he must be here all the time.


45. 《Naomi》: I try not to eat at the cafeteria too often. 《Jennifer》: [   ] The food there is pretty good.


46. Ms. Johnson was busy [   ] the house when the postman came.


47. The freeway is now [   ] to motorists after it was blocked off by a huge landslide yesterday.


48. Jim is very [   ] and dynamic; he enjoys physical activities and you can seldom see him stay still for more than ten minutes.


49. The cars are moving so slowly that I can [   ] them just by walking fast.


50. To see is    .