2019中考英语复习：大学英语四级单词提前预热

全国英语等级考试(PETS四级)难词精选

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We can do like these things:

First e must protect the factory form pouring aste ater into the river

Send e should s people from throing litter into the river.many kinds of litter may pollute the envirennt.

Finally e can tell the visitors ho important the ater is.

After doing these things,I think ater ill bee clearer sooner or later.