從方框中選擇合適的單詞，并用其適當(dāng)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.

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