Read the passage and fill in the blanks with proper words：（在短文的空格内填入单词7%）

Water is around us．Water is in the o ，in the lake and river and in the air．There is more water than land on the earth．All things must have water to live．The plants must have it．The animals must have it．We must have it，too．We cannot live without d water．Sometimes we do not have all the water that we n ．The land will dry up without water．Sometimes，there can be too much water in the land．If it rains very，very hard，the rain water will run down the hills．It takes some of the land with it when it runs down the hills．It is called erosion腐蚀when the water takes the land away．
Water on the earth will n be used up．It goes from the ocean to the air to make clouds．Then，it falls from the clouds down to the land．It runs off the land and out to the ocean again．The clouds in the air are m of water．Sometimes the water falls down from the ground．Some of it washes down and g back into the ocean．Some water that is not rain or snow falls down from the clouds．Some of this water is sleet雨夹雪．The sleet is made of little pieces of ice．Some water that is not rain or snow or sleet falls from the clouds．S of this water is hail冰雹．The hail is made of ice balls．

63．o
64．d
65．n
66．n
67．m
68．g
69．S ．