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


2. The field is too barren to yield crops, so the farmers decide to put some [   ] on it.


3. Janine will probably lose her job [   ] her boss in front of the entire staff last week.


4. Most students think that there is a need to [   ] bus fare, but not all students agree to have the fare increased by 35 percent.


5. [   ], they would not have solved their financial problem.


6. Can you [   ] how old Ms. Wang is? She is 50, but she looks as if she were only 30.


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


8. The city now looks very artistic and refreshing because it is [   ] with many colorful and well-crafted sculptures.


9. [   ] the family income, the Chang's could afford to buy a new car.


10. The secretary was [   ] for work because of the heavy traffic.


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


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


13. The power supply in this area is not [   ]. You had better save your file every ten minutes.


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


15. It is imperative that the city council     in favor of the city renewal plan. 


16. 《Sandra》:I think watching TV is a waste of time. Most programs are stupid or boring. 《Jack》: [   ] What about sports or the news? You watch those sometimes, don’t you? 《Sandra》: Well, actually for the news, I prefer the newspaper.


17. Athletes always wear clothes made of [   ] materials, so they may stretch their bodies without difficulty.


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


19. [   ] and blurred, it is extremely difficult to recover his sight.


20. The shopping [   ] policy aimed to stimulate consumption in order to boost up droopy economy.


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


22. We can find almost all the information we need [   ] surfing the Internet.


23. George Washington [   ] his father’s cherry-tree.


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


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


26. A: What do you usually do in your spare time? B: [   ]. I enjoy doing this especially after a stressful day.


27. 《Clerk》: Can I help you, Sir? 《David》: Yes. I want to buy a pair of jeans, Size L. 《Clerk》: I have several in your size. [   ]《David》: Yes, of course.


28. The key players in the energy market, [   ] heavy capital investment, have little interest in innovation.


29. No city, Tel Aviv or Jerusalem [   ], is home to more Jewish people than New York.


30. A:Anna? Anna Dickson? I thought it was you! B: [   ] A: Oh. I am so sorry. I must have missed her too much.


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


32. The interviewers were all very [   ] with the answers the job applicant gave.


33. A lot of heavy smokers [   ] lung cancer every year.


34. A: Could you run over to the store? We need a few things. B: [   ] What do you want me to get? A: Well, could you pick up some sugar and a few oranges?


35. 《Sylvia》: What's your favorite season? 《Amy》: [   ] 《Sylvia》: Me too. I hate cold winter days.


36. In the previous year, you [   ] ballpoint pens and pocket calendars to my school. Will you do the same this year?


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


38. In the [   ] of anyone better, we chose him as the leader.


39. __ activity should be avoided after an operation. 


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


41. The patient appreciated [   ] breakfast in bed when she wasn’t feeling well.


42. Employees are required to follow the standard operating procedures and to act ____. 


43. The new medicine is still in [   ] stages and will not hit the market until next year.


44. Mutual funds came into our country in recent years. This financial product was developed for those who do not have enough time, money and [   ] knowledge to invest.


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


46. The museum’s main hall [   ] an enormous book, and its restaurant looks like a big cake.


47. I sent an email to the CEO of this company last week but have not received any [   ] yet.


48. The cars are moving so slowly that I can __ them just by walking fast. 


49. __ the election is the question both political parties are asking. 


50. It seemed that the walls    .