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    从方框中选择合适的单词，并用其适当形式填空。

    recycle industry napkin plastic harm

    1. If      is  burnt, they’ll give off poisonous (有 毒的）gases.

    2. Freezing winter is      to orange trees.

    3. He wipes his mouth on the      .

    4. We should      garbage, not bum it.

    5. The information        is  important for our country.

    1. plastic 2. harmful 3. napkin 4. recycle 5. industry

    题目来源：一课一练创新练习九年级英语全一册人教版 > Unit 13 We're trying to save the earth!

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