1. I think thunder is scary, [   ] lightning is beautiful.


2.     the CEO walked into the conference room, all department managers became very nervous. 


3. The knife isn’t useful because its [   ] is dull.


4. Gorillas are __ the best communicators of all animals. 


5. Tina’s legs were black and blue and she had several burn marks on the arms. She may have been [   ].


6. His corruption as a government employer has put a [   ] on his long-standing reputation.


7. Old soldiers never die; they only __. 


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


9. [   ] intense competition, the prices of food and drinks would be much higher.


10. A few political extremists [   ] the crowd to attack the police.


11. I have been taking the Yoga class [   ] I came to this school.


12. Many people in the U.S. are staying away from restaurants, skipping vacations and [   ] on buying new cars.


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


14. Shelly prefers red roses [   ] yellow ones.


15. Let’s __ jump to the conclusion, okay? 


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


17. The [   ] of this scholarship will receive $30,000.


18. [   ] she told me I was her good friend, she never talked to me about her problems.


19. My brother's [   ] is to become a doctor; but he'll need to study hard to get into medical school.


20. The president of the United States can only serve two [   ] of four years each.


21. Oil and natural gas exist on this planet in a limited supply; therefore, it is essential for people to develop [   ] to these nonrenewable energy sources.


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


23. The government hopes that the charge for trash disposal can [   ] people from throwing away usable resources.


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


25. [   ] are those who act in contradiction to their stated beliefs or feelings.


26. To prevent sewage from entering the waterways and protect public health, the city councilman strongly demanded that the sewage system ____ in three months. 


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


28. From now on, any employee who is usually late for work will be [   ].


29. The search engine gives the user easy [   ] to the required information.


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


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


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


33. “What are you reading in that magazine?” “An article which [   ] fishing.”


34. The government should take measures to control the growing [   ]. Food prices have gone up sharply recently.


35. She can sing well and [   ]. That’s why her friends usually ask her to sing karaoke together.


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


37. The special municipality of Taipei is offering a cash [   ] of NT$20,000 to any female citizen who gives birth to a baby.


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


39. After the car accident, I kept [   ] that things will get better.


40. 《Jenny》: Where did you get your hair done? It looks so stylish. 《Lilly》: [   ] By the way, I highly recommend the hairstylist called Paul. 《Jenny》: Thanks. I’ll sure go take a look.


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


42. I went to the store [   ].


43. I was [   ] to find I did not have enough money to pay for the taxi fare. My face turned very red.


44. You must keep [   ] whatever your boss tells you to do, or you may be fired.


45. The escaping criminal [   ] himself as an old security guard, so the police failed to recognize him at first sight.


46. My mother always says we should think things through before [   ] anything.


47. The twins look so alike that even their parents confuse one with [   ] sometimes.


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


49. You should live within your income. Otherwise, you won’t be able to earn enough money to [   ].


50. He went for an ocean voyage and [   ] his health.