26. According to the recent research, heavy coffee drinking and heart attack are not necessarily ________ and effect.(2002年高考上海卷)

　　A.reason B.case C.fact D.cause

　　27. These chemicals may be harmful to human bodies. Use them with ________.

　　A. chart B. caption C. caution D. catalogue

　　28. Nowadays people have to pass various tests for professional ________ so that they can be qualified (使具有资格) for a well-paying job.

　　A. admission B. permission C. certificates D. perseverance

　　29. Finding information in today’s world is easy. The ________ is how you can tell if the information you get is useful or not. (2006年高考天津卷)

　　A. ability B. competition C. challenge D. knowledge

　　30. Today a Li Ning product is purchased every ten seconds. If you go into a school or university anywhere, the _________ are you will see students in Li Ning tracksuits (运动服) with the familiar logo (标志).

　　A. chances B. challenges C. competitions D. catalogue

　　31. We should promote opening-up and reform, and construct socialism with Chinese _________.

　　A. competitions B. challenges C. characteristics D. captions

　　32. Of the seven days in a week, Saturday is said to be the most popular ________ for a wedding in some countries. (2007年高考浙江卷)

　　A. character B. situation C. chance D. choice

　　33. Anyone who wants to be successful mustn’t give up in any ___________, and should always be full of confidence.

　　A. contribution B. circumstances C. competitions D. challenges

　　34. It can’t be a(n) __________that four jewelry stores were robbed in one night.

　　(2002年上海高考春季卷)

　　A . coincidence B. accident C. incident D. chance

　　35. He finished a difficult task on his own shortly after he entered the company, so his ________ looked at him with new eyes.

　　A. clerks B. civilians C. citizens D. colleagues

　　36. A car had a head-on _____ with a truck on the highway yesterday, killing 2 and inuring 5.

　　A. contest B. collision C. conflict D. contrary

　　37. Sometimes a few words of _________ from his teacher to the one who has just failed in the experiment may encourage him to stand up.

　　A. compromise B. confidence C. comfort D. consultant

　　38. The better ________ you have of words, the better chance you have of saying exactly what you mean.

　　A. contribution B. master C. command D. contradiction

　　39. The teacher usually writes his _________ on the margin (页边空白处) of the composition.

　　A. comments B. words C. review D. command

　　40. By signing the lease (租约) we made a ________ to pay a rent of $150 a week.

　　A. comment B. commitment C. conception D. consensus

　　41. It is said that dogs will keep you _________ for as long as you want when you are feeling lonely. (2006年高考江西卷)

　　A. colleague B. friend C. companion D. company

　　42. The hills in my hometown which used to be covered with green trees are now mostly __________.

　　A.empty B.blank C.vacant D.bare

　　43. In some countries, some people do not even have fresh water or ________ health care.

　　A. basic B. botanical C. brief D. bureaucratic

　　44. Cycling is highly _________ to people’s health and the environment.

　　A. bitter B. beneficial C. basic D. botanical

　　45. Some students often listen to music ________ classes to refresh themselves. (2007年高考四川卷)

　　A. between B. among C. behind D. during

　　46. This new model of car is so expensive that it is _______ the reach of those with average income. (2006年高考江苏卷)

　　A. over B. within C. beyond D. below

　　47. You will not know whether it is __________ or sweet if you don’t taste it yourself.

　　A. boring B. cheerful C. changeable D. bitter

　　48. Although the _________ scientist has made his mark in the field of physics, he is sometimes absent-minded in his daily life.

　　A. brilliant B. casual C. bureaucratic D. civil

　　49. John was dismissed last week because of his __________ attitude towards his job. (2007年高考上海卷)

　　A. careful B. casual C. classical D. classic

　　50. They are ____ investors who always make thorough investigations (调查) both on local and international markets before making an investment.

　　A. common B. complex C. cautious D. confident