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


2. As __ as it had started, the rain stopped and the sun came out from the blue sky. 


3. Not until Toyota debuted the model Prius in the late 1990s [   ] the technology of hybrid engine.


4. I am [   ] the exam will be held next Tuesday. I just called to check the date.


5. I [   ] know him. I have talked to him no more than three times.


6. Where did you have your hair [   ]?


7. The minister went to Hong Kong to attend the conference [   ] our government.


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


9. It's getting late. Let's [   ].


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


11. A fine will be     on the drivers who fail to pay their highway toll on time. 


12. Where are you going? I’m going to the [   ].


13. Accounting is a profession [   ] has always interested me.


14. This machine is [   ]. All you have to do is turn it on and it will operate by itself.


15. Dr. Wilson, __ is the CEO of the company, will be here to give a speech at the opening ceremony next week. 


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


17. Tom’s colleagues threw a [   ] party for him the day before he officially retired. They wanted to show how much they would miss him.


18. Not only [   ] most male birds have extremely beautiful feathers, they know how to use them.


19. The congressmen have reached a ____ that smoking should be banned within thirty feet from the entrance of a building. 


20. 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.


21. I like this apartment better. It’s cheap, and [   ], it’s near my office. I can walk to work.


22. He decided to continue the exhausting training for the Olympics, [   ] his physical condition was poor.


23. Defined most broadly, folklore includes all the customs, beliefs, and traditions that people have __ from generation to generation. 


24. A thorough analysis of market [   ] can increase the success rate of a new product.


25. [   ] the election is the question both political parties are asking.


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


27. It was really a [   ] for the little boy to survive the air crash.


28. At first I didn’t find her annoying, but after a while her behavior began to [   ] me.


29. A 5-year-old child was lost in the [   ]. The forest made it hard to trace him down.


30. A single bacteria, [   ] the right conditions, divides rapidly into colonies of billions in one day.


31. You should have finished this work a week ago, but you didn’t. I think you should give me an [   ].


32. ____ you encounter any problems regarding the new system, please notify the tech support ASAP. 


33. 《Ken》: Oh my! 《Claire》: [   ]《Ken》: My headache is killing me.


34. You should always [   ] your opinions politely.


35. Do not forget your ticket! Only ticket-holders will be [   ] to the concert.


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


37. English is important in Taiwan, [   ] for business people.


38. A friend of [   ] is coming to stay with me next week.


39. We can always work toward improving our self-control, and, [   ], we can help others do the same.


40. If a soldier lost his weapons in a __, he needed to fight with just his body. 


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


42. I can’t ride my bicycle [   ] there isn’t any air in one of the tires.


43. 《Lin》: You look so angry. What happened? 《Chen》:This morning I took my car to the garage to have them check the air-conditioner. They only gave it a once-over, refilled it with some Freon, and charged me 3,000 dollars! 《Lin》: No wonder you’re livid. [   ]


44. A restaurant manager should know how to deal with [   ] from customers who are not satisfied with the food or the service.


45. This coffee shop is famous because it sells numerous varieties of coffee beans [   ] from around the world.


46. The washing machine is not working properly. I have to get it [   ].


47. Most of the people in my office want to stay [   ], so they exercise regularly.


48. A: How are you feeling today, Mr. Lin? B: [   ]. A:I see. Please sit back and open your mouth. Your throat is swollen, too. Do you have any other symptoms? B: I also had a terrible headache last night.


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


50. A [   ] has four corners.