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People hardly replace any of them when they cut down so many trees every year, _______?

A. don’t they                               B. don’t people  

C. do they                                 D. do people

1、C

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People hardly replace any of them when they cut down so many trees every year, _______?

A. don’t they                               B. don’t people  

C. do they                                 D. do people

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