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28、We’re conducting a nationwide survey of people’s reading habits. Do you have five     minutes _____ a few questions?                                                

  A. answering                                                       B. to answer                

  C. to have answered                                             D. having answered

28、B

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We’re conducting a nationwide survey of people’s reading habits. Do you have five     minutes _____ a few questions?                                                

  A. answering                                                       B. to answer                

  C. to have answered                                             D. having answered

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