1. You should always [   ] your opinions politely.


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


3. He bought a car right after he obtained a driver's [   ].


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


5. The key players in the energy market, ____ heavy capital investment, have little interest in innovation. 


6. A thorough analysis of market ____ can increase the success rate of a new product. 


7. Steve was [   ] with joy when he found he had won the first prize in the lottery.


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


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


10. We have been waiting for Jack for almost two hours. I wonder [   ].


11. I [   ] use a payphone. I just use my cellphone instead.


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


13. You could not [   ] all of your readings the night before the exam. You had better start to prepare for the test at least a week earlier.


14. Tigers are a(n) [   ] species, but they are still hunted for their bones and skins in some areas.


15. The total number of the [   ] people in that remote area is decreasing.


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


17. Research in the environment has [   ] that the rain forests throughout the world are being ruthlessly destroyed.


18. Most people like to talk about the subjects with [   ] they are most familiar.


19. The air traffic controller informs the pilot how far [   ] from the touchdown point.


20. A: Gee, your room is a mess. B: I have been preparing for an important exam these days. [   ]


21. I will attend Mr. Wang’s wedding [   ] my father, who has gone to Hong Kong on business.


22. Many couples wanted a divorce but could not have one because their case was not covered by any [   ].


23. Modern people tend to value material enjoyment too much and ignore [   ] pursuit.


24. The total number of the staff is [   ] larger in our company than that in yours.


25. A: Can you visit us in New York over Christmas? B: I really want to, but I don’t think I can. A: [   ]. What’s the problem?


26. The [   ] of the theory is still being questioned since a number of researchers disagree with its main argument.


27. A: [   ] B:What sorts of thing?


28. My father and his partners’ cooperation is based upon their [   ] respect and understanding.


29. This ring was a family heirloom, which was [   ] from my grandfather to my father.


30. If I were you, I would purchase more insurance, just for your own [   ].


31. My family’s newest [   ] is a print shop in Taipei.


32. If a person doesn’t know a word, he or she should look it up in the [   ] in the back of the book.


33. The police arrested the suspect, but in the absence of [   ] he was set free soon.


34. A: What’s for dinner? B: How about some sushi? A: [   ] I prefer a hot bowl of noodles to a cold dish. B: I see. Let’s have our dinner at the noodles stand across the street.


35. [   ], I didn’t like Susie, but then I found she was a nice girl. Now we’re good friends.


36. George suffered very serious brain [   ] in a car accident.


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


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


39. The [   ] earthquake has buried over 18,000 lives in southwestern China’s Sichuan province.


40. The farmer put a lot of [   ] on his rice field, hoping that the crops may flourish.


41. As [   ] as it had started, the rain stopped and the sun came out from the blue sky.


42. In my [   ], students shouldn’t spend too much time chatting on the Internet.


43. 《Joanna》: I want to go shopping. [   ]《Rainy》: Sure. I also want to buy some winter clothes.


44. Peter always complains about the hot and [   ] weather in Taiwan. He misses the dry and cool seasons in Florida.


45. 《Woman》: May I speak to Mr. Smith? 《Man》: [   ]《Woman》: Never mind. I will call him again later this afternoon.


46. Time [   ] quickly, so you’ll need to use it wisely.


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


48. Simon is tall, but his brother is [   ] taller than him.


49. 《Nicole》: Do you have any plans for tomorrow, Alison? 《Alison》: [   ]《Nicole》: Let’s go shopping!


50. Advertising is distinguished from other forms of communication [   ] the advertiser pays for the message to be delivered.