Water is very important to _36_ things. Without water there can be _37_ life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves. Water _38_ in offices, factories and schools. Where _39_ is water needed?
Water covers _40_ part of the earth. There is water in seas, rivers and lakes. Water _41_ almost _42_. Even in the driest part of the world there _43_ some water in the air. You cannot see it or feel it when it is the part of air. The water in seas, rivers and lakes is a liquid. The water in the air is with liquid or gas.
Clouds are made of water. They may be made of little drops of water. They may also be made of snow crystals(晶体). Snow crystals are little crystals of ice. Ice is frozen water that has become _44_.
Water, you have found out, may be a solid, or a liquid, or a gas. When it is a solid, it may be as hard as stone. When it is a liquid, you can pour it _45_ of a cup. When it is a gas, you cannot see it or feel it.
36. A. life B. living C. live D. lives
37. A. some B. any C. every D. no
38. A. needs B. need C. is needed D. are needed
39. A. else B. other C. also D. either
40. A. many B. more C. most D. much
41. A. finds B. is find C. is found D. is founded
42. A. somewhere B. anywhere C. nowhere D. everywhere
43. A. have B. has C. is D. are
44. A. solid B. liquid C. gas D. snow
45. A. out B. into C. in D. with