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Trees take ________ from the air, and release ________ into the air.


  1. A.
    harmful gas; oxygen
  2. B.
    oxygen; harmful gas
  3. C.
    harmful oxygen; gas
  4. D.
    oxygen; oxygen
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【小题2】We may use more electricity by______.
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【小题3】______ will make global warming worse.
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3.Using less electricity does good to global warming because_______.

A. the less electricity is used, the more greenhouse gases are produced

B. the more electricity is used, the more greenhouse gases are produced

C. more electricity is used, less greenhouse gases are produced

D. less electricity is used, more greenhouse gases are produced

4.Which is the following is NOT TRUE according to the passage?

A. Driving cars on sunlight helps to stop global warming.

B. When cars burn fossil fuels, they produce greenhouse gases.

C. When trees grow, they send carbon dioxide into the air.

D. By planting more trees, we can lower the number of greenhouse gases in the air.

 

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C.turning up CD players                    D.turning off TV

3.______ will make global warming worse.

A.Methane          B.Cans             C.Newspapers       D.Bottles

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A.the less electricity is used, the more greenhouse gases are produced

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C.more electricity is used, less greenhouse gases are produced

D.less electricity is used, more greenhouse gases are produced

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A.Driving cars on sunlight helps to stop global warming.

B.When cars burn fossil fuels, they produce greenhouse gases.

C.When trees grow, they send carbon dioxide into the air.

D.By planting more trees, we can lower the number of greenhouse gases in the air.

 

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