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1 . 我们希望防止水被污染。(prevent…from…)(汉译英)
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2 . Measures must be taken to protect the river from being ________ (污染) . (根据汉语提示单词拼写)
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3 . The island has been seriously _________ (污染) by a copper mine.
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4 . He found that it came from the river________ (污染)by the dirty water from London. (根据汉语提示单词拼写)
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5 . People are trying to make the _______ (pollute)rivers clean again.
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