V. 完形填空：（共10小题；每小题1分，满分10分)
75% of the earth’s surface is covered 46 water. However, the world is not only hungry but also thirsty for water. It seems 47 to you, isn’t it?
In fact, about 97% of water on the earth is sea water 48 salt water, which can’t be used directly. Man can 49 drink or use the other 3％ of the fresh water 50 comes from rivers, lakes and underground. Some of it is in the form of icebergs（冰山）and glaciers(冰川).
As things stand today, this small amount of fresh water is still enough for us. On the other hand, because 51 number of people in the world 52 larger and larger, more and more fresh water is needed. That’s 53 water shortage becomes a big problem.
How can we 54 this problem? It’s both the scientists’ and 55 duty to find some ways to turn salt water into fresh water.
46. A. by B. with C. on 47. A. strange B. interesting C. wonderful 48. A. and B. but C. or 49. A. also B only C. still 50. A. which B. where C. what 51. A. a B. / C. the 52. A. are becoming B. is becoming C. become 53. A. why
B. what
C. how
54. A. turn out B. work out C. put out 55. A. everyone B. everyone else C. everyone else’s
VI．阅读理解:（共20小题；每小题2分，满分40分） (A) 阅读材料，从题后所给的A、B、C三个选项中选出最佳答案。
Everybody wants to be healthy. You know food is very important. There are many healthy foods. You can have more bananas, apples, oranges, tomatoes and lettuce（莴苣） because fruits and vegetables are good for yo