I feel it is our duty not to our environment. 题目和参考答案——青夏教育精英家教网—

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4.I feel it is our duty not to______(污染) our environment.

4. pollute

题目来源：仁爱英语同步练习册九年级上册仁爱版 > Topic1 Pollution has caused too many problrms.

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