第二节：完形填空（共20小题；每小题1.5分，满分30分）
What is in the drug that makes you sick or dead? For example, cocaine is harmful, but what makes it harmful?
I can’t tell you all about drugs, but I can ___36___ you think about them in this ____37____ way. Your body is a very complicated machine, ____38____ a lot of chemical machinery, all of which is finally turned ____39____ it all works together. Special chemicals, which we call drugs, can affect it in many different ways.
Some drugs are ____40____ when your body has a problem, as with disease—causing bacteria. Then someone may give you aspirin to keep your temperature from going too ____41____ or some penicillin (青霉素) ____42____ it stops the growth of some kinds of bacteria. ___43_____, all drugs are really poison, ____44_____ if you take too much, so you must always use them ____45____.
Why do some people take drugs like cocaine? For a little while they seem to make you feel better, or happier. But ____46____ their effects have ____47____, your body has to pay an extra ____48____ to get back to normal. That makes you want to get ____49____ of the drug.
Drugs like cocaine have their special effects because they act as ____50____ for your nervous system. They cut off some of your nerve pathways and take away some of your senses and your ____51___. They make you want always more. And just a little too much can even ____52____ nerves to your heart and stop its beating
Many of us worry about the ____53____ around us and what pollution does to us. How about your internal environment and what goes on ____54____ you? You control that all by yourself in what you put into your ____55_____. Most drugs are pollutants. You would not want pollutants in the air and water around you. Why would you want pollutants in your body?
36. A. make B. cause C. help D. let
37. A. funny B. different C. simple D. true
38. A. just B. really C. especially D. sometimes
39. A. as if B even if C. where D. so that
40. A. powerful B. helpful C. painful D. helpless
41. A. high B. tall C. much D. hot
42. A. when B. until C. as D. before
43. A. besides B. thus C. however D. naturally
44. A. at most B. at least C. at times D. at first
45. A. carefully B. easily C. carelessly D. a lot
46. A. where B. before C. after D. until
47. A. worked B. worn C. appeared D. lost
48. A. number B. quantity C. amount D. price
49. A. Some more B. nothing C. a little D. a few
50. A. guards B. medicine C. chemicals D. poisons
51. A. worries B. happiness C. freedom D. pride
52. A. lead B. block C. offer D. stick
53. A. places B. nature C. people D. environment
54. A. inside B. around C. outside D. next
55. A. heart B. head C. body D. mind
