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


2. We can always work toward improving our self-control, and, __, we can help others do the same. 


3. She claims to be an advocate of animal rights. [   ], she is always wearing fur and carrying a crocodile-skin purse.


4. The traffic accident took three lives, [   ] the truck driver.


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


6. Before you fly, please be sure to read the list of items [   ] from being carried onto the plane. You must not bring any of these items to the security checkpoints.


7. I am looking forward to [   ] from you at your earliest convenience.


8. Nancy screamed when she saw a taxi [   ] into an old woman on the street.


9. In this industry, you really need to keep [   ] if you don't want to be caught off guard.


10. Among the things that money cannot buy [   ] good health in the mind and body.


11. That is my [   ] favorite restaurant. The service is bad and the food doesn't taste good.


12. The best way to buy train tickets [   ] book online.


13. I have lots of things to carry, but I have only two hands. Would you mind [   ] for me?


14. Paparazzi are photographers who [   ] celebrities’ privacy by taking their pictures.


15. Just look at how much we [   ] when we worked together last week.


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


17. 《Lily》: I heard you’re moving to New York. 《Brian》: Yes. I’ve got an offer in upstate New York. 《Lily》: Oh, that’s great! But I’m going to miss you. 《Brian》: Me, too. [   ]


18. Remember to tie your cow [   ] the tree before you go there


19. Do you mind [   ] to the post office with me? I don’t think I know how to get there.


20. Foreign-trained employees have to __ their learned skill-sets to the local market. 


21. The museum’s main hall __ an enormous book, and its restaurant looks like a big cake. 


22. Could you please tell me [   ]?


23. It [   ] me two hours to get there because the traffic was awful.


24. After eleven o’clock in the evening, the bus is empty [   ] the driver and the conductor.


25. I __ know him. I have talked to him no more than three times. 


26. Since being slim is the trend, Margaret is trying to lose weight by [   ] herself.


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


28. 《Ken》: Taxi! 《Driver》: Where would you like to go, sir? 《Ken》: [   ]


29. We don’t need to [   ] what the future will hold; just focus on the present task.


30. Historical insights serve to clarify and [   ] the critical activity of a period.


31. John [   ] broke his glasses while playing basketball with his classmates. He should have been more careful.


32. 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?


33. Mary is never absent and always studies hard, so she [   ] as one of the excellent students in her class.


34. He is a very conscientious professor. Never [   ] he let his students leave his classes earlier.


35. A:My goodness! There are so many people waiting outside! B: [   ] A: Maybe we should just go to another restaurant. Looks like it will take forever to go get in. B: That’s a good idea.


36. A:Hey, Paul. I see you walking lame all the way. [   ]? B:Nothing. I just sprained my ankle while playing basketball the day before yesterday.


37. The freeway is now __ to motorists after it was blocked off by a huge landslide yesterday. 


38. A: Do you mind if I invite Kevin to our party? B: [   ]


39. When she [   ] in track-and-field events in the 1960 Olympics, Wilma Rudolph won three gold medals.


40. Janet put forward the proposal that the program [   ] until Mr. Brian Reynolds came back from abroad.


41. The athletes are getting in shape for the big [   ] next month.


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


43. Professor Lin does [   ] not late assignments. Students have to hand them in on time.


44. There is a risk that the longer people put off their work, [   ] it will eventually get done.


45. A:Why did Judy leave? B: [   ]


46. Do you know the man [   ] lives next door?


47. What can you tell me about [   ] the subway in Tokyo?


48. Children like to go trick-or-treating in special     on Halloween. Some may dress like an angel or a robot. 


49. The government is taking a very [   ] approach to managing this economic crisis.


50. The former CEO of Highhills Inc. was believed ____ a suicide.