题目内容
Read the passage and fill in the blanks with the proper words.
The earth is our home. We must take care of it. That is to say we must keep the land, air and water clean.
But man began to pollute the earth after he first m_________ a fire, w________ his clothes in the river and threw dirty things on the ground. Many years ago, p__________ was not so serious because there were not so many people. There was e___________ clean air, land and water. When the land or the river was dirty in one place, man moved to a_________ place. But now man is slowly polluting the whole world and there is not enough clean air, or clean land or clean water. More people, m_________ pollution.
答案:made;washed;pollution;enough;another;more
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