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5. 挖出 

6. 不但 而且 

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3. 對……有害 

4. 在正確位置 

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1. 做調(diào)查 

2. 刷牙 

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11. 再使用 

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9. 形成 

10. 滿不在乎地;粗心地 

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7. 石油;原油;食用油 

8. 氣體;煤氣 

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5. 土壤  6.煤 

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3. 有害的   4.空的 

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1. 調(diào)查   2.灰塵,塵土 

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dig,  plant,  cut, blue, pollution, serious, wise, save,  environment,    realize

Andy. Do you know what we will do during our class trip      this weekend?

Wendy:We will climb the hill and have a picnic. And some      trees will be 1  at the foot of the hill.

Andy:Yes. We have already prepared some young trees. I      am so happy that I can do something to fight 2         . And

      I am looking forward to 3  in the ground         with my new spade (鐵揪)  

Wendy: Yes. The dirty air is a 4 problem. With more        trees,we will have a 5   sky than before.

Andy: You,ve got the point. It's great that more and more

    people have 6  how terrible the problem is.       They are taking action to create a greener world.     Morepeople are taking part in 7  the Earth.

Wendy :That's good news. It is 8 of people to plant         trees.

    Trees are important in a clean and green 9  .

Andy:But we are not doing enough. I hope fewer trees in      the world are 10  down.

1.   2.   3.   4.   5.  

6.   7.   8.   9.   10.  

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