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—China is beginning to test the air quality with the new standard(标准)PM2.5

—Good news! Then the old PM10 standard will be .

  A. out of style     B. here and there   C. on the way    D. in a hurry

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2. When feeling           , you can wear white.
3. Do you know that a bull has four           ?
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You may have known several kinds of police --- traffic police, fire police and street police. But have you ever heard of energy-saving(节能) policeman?

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Other Chinese cities, like Wuhan in Hubei Province and Yangzhou in Jiansu Province, are going to follow Beijing’s steps in setting up a similar police team.

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   B. it’s difficult to find good ways to save energy

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   D. it’s difficult for one to do something good for the environment

 

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