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10. It is dangerous or had for your health.

　　 ☆單詞聚焦☆

9. It is too expensive.

8. It brings people comfort.

7. It is important for science.

6. It is clean and does not pollute the air.

5. It can help many people in the future.

4. It is good for the economy.

3. Does that matter?

2. I would rather not tell you.

1. It can't be tree.