1. More advances in technology [   ] in the last decade than in any other time in human history.


2. Benson [   ] his back when he fell off the tree.


3. In the face of energy crisis, scientists worldwide are now exploring [   ] energy to replace fossil fuels.


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


5. Old soldiers never die; they only [   ].


6. After being bitten by a [   ] snake, John was sent to a hospital.


7. Tom is very [   ] and helpful, and it has been nice having him in class.


8. I [   ] out a document when my boss walked into the office.


9. After eleven o’clock in the evening, the bus is empty __ the driver and the conductor. 


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


11. Many families are struggling to [   ] during this recession.


12. People who feel they must have the best of everything are rarely [   ]. It’s better to have more realistic ideas about what is important in life.


13. I didn’t believe [   ] Jeffrey said, [   ] annoyed him very much.


14. A: Why did you feed that kitty? B:There is nothing [   ] a homeless cat.


15. It is a [   ] of law to ride a motorcycle without wearing a helmet.


16. The team that won the championship was awarded a glittering [   ].


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


18. 《Ken》:I have two tickets to the basketball game tonight. Would you like to go? 《Tim》: [   ]《Ken》: Why can’t you go? 《Tim》: I’ve got to hand in a 10-page report tomorrow morning and I’m still working on it.


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


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


21. Kate lost her way while driving to River City. She [   ] her road map at home.


22. Please turn off the light. We should save [   ]; otherwise, the bill might go up again.


23. With a big family to support, John has been [   ] trying to get a job for months, but has not found one yet.


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


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


26. 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.


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. Tom comes from a wealthy family, but John does not. In spite of their different [   ], they have become best friends.


29. It was [   ] of you to let me use your cell phone. My parents felt less worried after they got my call.


30. For many people, one of the joys of __ is the prospect of parenthood. 


31. When traveling around the world, a person must [   ] eating different types of food.


32. My son is [   ] of the dark, so he never walks out of the house after sunset.


33. The female singer A-Mei, also known as Amit, is ________ to millions of people in Asia.


34. Many journalists do not [   ] whether or not it is appropriate to interview a child during a tragic event for he/she is usually too young to understand the trauma he/she is involved in.


35. U.S. Secretary of State Hillary Clinton said on Saturday the United States and China can help pull the world out of economic [   ] by working together.


36. Mrs. Lin told Jane that she had to clean up her room and empty the dishwasher before she could leave for the game. Jane promised her mom that she [   ].


37. Acid rain causes the ground to release [   ] substances; plants and trees are thus slowly poisoned.


38. To have her own clothing store, Jane borrowed money from family members to get her business [   ].


39. [   ] you encounter any problems regarding the new system, please notify the tech support ASAP.


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


41. 《Martin》: I did terribly at the math exam. I don’t think I will pass. 《James》: [   ] You’ve spent too much time playing the computer games lately.


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


43. The local farmers are looking to advanced agriculture as better protection from foreign __ after Taiwan joins the WTO. 


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


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


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


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


48. 《Judy》:I am going to take the driving test tomorrow, and I am feeling so nervous. 《Joan》: Take it easy! I will [   ]. 《Judy》: Thanks. I hope that I can get my driver’s license as soon as possible.


49. Students must study hard, [   ] they will fail the test.


50. Anna has been asking Henry to eat more healthily but he hasn't been [   ] by her arguments.