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英语单词填空90% of the water on Earth that human being can drink r

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英语单词填空
90% of the water on Earth that human being can drink right now is underground.It is easy to pollute 1)g__________.For example,4.5 litres of paint seeping into the earth can 2)p___________1,125,000litres of drinking water.
If you leave the water3)r_________while you wash the dishes,you can waste 135 litres of water——enough to 4)f_______65 cans of soft drink.
5)B_________ it or not,the water we flush down our toilet starts as fresh water!6)E_________ time you flush,your toilet uses about 22.5 to 31.5 litres of water which is actually unnecessary.
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