阅读下面短文,掌握其大意,然后从41—50各题所给的四个选项中选出一个最佳答案。
Water is the most important of all the things we eat and 41. Not many people understand this, but it's quite 42. The human body( A£)can go without 43 for a long time, yet two or three days 44 water can usually make people die.
Many people don't understand how 45 water the human body needs 46 work well, and many people do not drink enough, 47 in hot weather. Our body is mostly(:大部分)water about 67-75 percent(百分之). 48 we don't have enough, we'll feel 49 and many will get ill. So, you 50 , how important water is to us all.
41. A. have B. drink C. take D. cook
42. A. true B. difficult C. easy D. wrong
43. A. food B. water C. drink D. air
44. A. in B. through C. without D. with
45. A. many B. much C. widely D. a bit
46. A. and B. to C. its D. or
47. A. even B. ever C. almost D. still
48. A. Because B. For C. Since D. If
49. A. worried B. angry C. tired D. afraid
50. A. hear B. know C. guess D. look