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


2. Not until Toyota debuted the model Prius in the late 1990s ____ the technology of hybrid engine. 


3. I didn’t go to Taipei last week; I wish I [   ] there.


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


5. I haven’t decided when I’m [   ] New York. I’ll let you know once I get the flight ticket.


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


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


8. Volcanic [   ] grounded thousands of passengers and fliers across Europe last year.


9. 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.


10. The social welfare system ____ provide the underprivileged people with sufficient support. 


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


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


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


14. Do you have [   ] for one thousand dollars?


15. A: Excuse me. I lost my cell phone on the MRT train. B: [   ] A: I lost my cell phone on the MRT train. Can you help me find it?


16. We are so glad that Miss Snow is teaching [   ] English.


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


18. Newspapers are a good way to hear the news. [   ] TV news programs.


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


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


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


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


23. Many runners aim to run like an [   ] .


24. The economy in that country is facing a severe slowdown and possibly a __ in the next few years. 


25. On the average, a healthy heart [   ] to pump five tablespoons of blood with every beat.


26. I had a great time reading the book [   ] you lent me.


27. ____ for the sales in the first quarter may not necessarily be the final sales volume at the end of the quarter. 


28. I read about the crime in the [   ].


29. The town [   ] great changes since I was here last time.


30. Peggy has a big advantage [   ] most girls when it comes to basketball because she’s so tall.


31. It is often said that prevention is better than cure, so why not take some __ in advance? 


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


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


34. Public education [   ] would need to be increased for small-size classes, teacher training programs and new E-learning facilities.


35. [   ] speaking, you don’t look nice in that sweater. The stripes on it make you look fat.


36. Library users will be fined for returning books after the [   ] date.


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


38. You can’t master English overnight! Remember that speaking it well [   ] a lot of practice.


39. __ and blurred, it is extremely difficult to recover his sight. 


40. Many portable products are made as     as possible for user’s ease to carry. 


41. Which fruit is this country famous for, bananas or [   ] ?


42. Do you think it good for students to be absolutely [   ] without making any objections in any case?


43. When there is no [   ], you had better compromise; otherwise, you might be caught at a deadlock.


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


45. The convicted man [   ] against the judge's verdict because new evidence had proved his innocence.


46. Like [   ] other language skills, reading requires practice.


47. The piano is one of the most popular musical [   ] today.


48. [   ] for the sales in the first quarter may not necessarily be the final sales volume at the end of the quarter.


49. The building collapsed, and only one person buried underground could [   ] survive the catastrophic earthquake.


50. The manager talks as if he     mad at you, but this is just the way he talks to everybody.