短文填空，用括號中所給英文單詞的適當(dāng)形式填空或根據(jù)漢語提示寫出英語單詞(必要時注意形式變化)，完成1-10題(每空不超過兩詞)。并將答案用0.5毫米黑色簽字筆寫在答題卡相應(yīng)的位置上，每小題1.5分，共15分。

To understand why the Earth is warming up. 1. (one) of all, we need to understand why it is warm. Our planet 2._ (cover) with atmosphere(大氣）.Sunlight passes 3. (通過) the atmosphere and reaches the Earth. The Sun heats up the 4._ (Earth) surface. When the heat rises into the air, it is stopped by some special gases in the atmosphere like CO2, the 5. (hot) returns to the Earth and keeps it_6._(warm) .

Power stations and cars release (釋放) so 7. (much) greenhouse gases every day. So we can help stop global (全球的) warming by using less electric things such as8. (關(guān)掉) lights when we leave a room, or asking our parents to turn down the heating in our house 9. (save) energy. We can also stop global warming by finding other 10. (way) of transportation. For example, ride a bicycle or walk instead of going by car. Another way to help stop global warming is to plant and care for trees. Because trees take in CO2, they are our best friends when fighting against global warming.

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