My father never told me what the O. Henry story was about. But i doubt that it could have been better than his own story.

　　49. Who found the O. Henry’s manuscript?

　　A. The girl’s mother.

　　B. The author’s father.

　　C. The girl.

　　D. The author.

　　50. Which of the following might explain the fact that the manuscript was found in the attic?

　　A. O. Henry once worked in Houston.

　　B. O. Henry once stayed in Galveston.

　　C. O. Henry once moved to Des Moines.

　　D. O. Henry once taught at SMU.

　　51. The underlined word “authenticated” in Paragraph 2 probably means __________.

　　A. named

　　B. treated

　　C. proved

　　D. described

　　52. According to the text, why did the author’s father go to Des Moines?

　　A. To sell the O. Henry story.

　　B. To meet the author himself.

　　C. To talk with the O. Henry expert.

　　D. To give money to the girl.

　　B

　　(2017·山东实验中学一模)

　　Global Positioning Systems (全球定位系统) are now a part of everyday driving in many countries.These satellite­based systems provide turn­by­turn directions to help people get to where they want to go.However，they can also cause a lot of problems，send you to the wrong place or leave you completely lost.Many times，the driver is to blame.Sometimes a GPS error is responsible.Most often，says Barry Brown，it is a combination of the two.

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