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3. From the passage we can infer that in the office_______ .    

A. Using computers is a waste of resource.

 B. Many people don’t turn off the computers after using them.

 C. Computers are run by electricity. 

 D.A computer is not a must for working.

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2.How many kinds of waste are mentioned in the passage?

 A. 2              B. 3              C. 4              D. 5

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1.The main purpose of the passage is to tell people___________.

 A. the disadvantages of working in an office.

 B. the waste produced in an office.

 C. to save resources when working in an office.

 D. how to save water in a restroom.

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19. A. something        B. everything       C. anything        D. nothing     

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18. A. unless           B. if             C. because         D. until       

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17. A. pay             B. take            C. have           D. search      

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16. A. returned         B. changed         C. said            D. turned     

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15. A. angry           B. surprised        C. happy          D. worried    

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14. A. showed          B. watched         C. accepted         D. picked     

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