1. A lot of debris ____ at the site of explosion for quite a while. 


2. Violence has become so [   ] in movies these days that many parents do not want their children to watch them.


3. Tim knows smoking is unhealthy but he is having a hard time [   ].


4. Do you have [   ] for one thousand dollars?


5. It didn’t take us long to get here because there [   ] traffic.


6. Group registrations are not allowed. Each member must register for the conference    . 


7. I only wish that all my lectures drew such favorable [   ] as this time.


8. After [   ] his homework, he decides to go out for a break.


9. Sharon was going to pay for the yellow blouse with credit card, [   ] then decided to pay cash instead.


10. This book offers a     guide to hotels in Tokyo. The author made a report on every single hotel there. 


11. The police have suspected him of involvement in the suicide bombing but there is no [   ] evidence to arrest him.


12. A:Did the committee members ask you many questions in your thesis defense? B: [   ]. I am not optimistic about the result of the defense.


13. The original model has been [   ] and replaced by the new one.


14. On the average, a healthy heart [   ] to pump five tablespoons of blood with every beat.


15. It is reported that there’s [   ] tension between the refugees and the local population in Pakistan.


16. There is a risk that the longer people put off their work, __ it will eventually get done. 


17. Brian and Jerry are close friends [   ] their difference in age and religion.


18. The main thing that makes mobile phones [   ] harmful is radiation.


19. [   ] are small stores that sell fashionable clothes, shoes, jewelry, etc.


20. Tim [   ] down 12 cans of beer in 10 minutes and didn't show any sign of being drunk.


21. A:May I ask what kind of work you are doing? B:I am working for the auditing department of the City Government. A: [   ] B:Yes, she works as a high-school teacher.


22. The mayor determined to build a [   ] city. By then, users can get access to the Internet at any time and any place in the city.


23. If a soldier lost his weapons in a [   ], he needed to fight with just his body.


24. Academic performance should not be [   ] purely by examination results, which concern only a limited aspect of learning.


25. Many companies [   ] e-mails sent out by their employees. Is it OK for employers to check on their employees like this?


26. The job of a dentist [   ] a lot of patience.


27. U.S. Secretary of State Hillary Clinton said on Saturday the United States and China can help pull the world out of economic [   ] by working together.


28. A:Good afternoon, Great Western Restaurant. This is Steven. How may I help you? B: I would like to make a reservation. A: Certainly, Madam. For what [   ]?   B: September 8th.


29. Don’t buy me a whole cake. A [   ] will be enough.


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


31. My mother [   ] for me when I arrived home last night.


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


33. 《Tom》: Are you free tonight? 《Cathy》: [   ]《Tom》: Too bad. I was thinking maybe we could go see a movie tonight.


34. Michelle would certainly have attended advisory board meeting __ on the highway. 


35. In this age of globalization, when people have more chances to travel, it is a great [   ] to speak more than one language.


36. For many people, one of the joys of __ is the prospect of parenthood. 


37. In the past year I have developed an important relationship with my [   ].


38. The nurse supported the sick child because he was too weak [   ] by himself.


39. This child has been [   ] by his parents for a long time because they have been too busy working.


40. Mary can't hear, and she can hardly speak [   ].


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


42. I like all [   ] of music—pop music, country music, jazz and so on.


43. My uncle had a 15-year-long [   ] in business before he became a teacher.


44. A harmful chemical has been found in US beef products, so many [   ] choose to buy local beef instead.


45. A brake is a device designed to [   ] or stop the motion of a mechanical body.


46. A single bacteria, __ the right conditions, divides rapidly into colonies of billions in one day. 


47. I may not be as [   ] as you, but I believe my hard work can make me successful in the long run.


48. The government may require individuals to limit the carbon dioxide they produce to [   ] global warming.


49. I’m a grown man. Don’t talk to me [   ] I were a three-year-old kid.


50. As the project depends on [   ] at the federal level, the city and county may have to wait until the budget cutting ends.