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单项选择题

Questions 1 to 5 are based on an interview. At the end of the conversation you will be give 10 seconds to answer each of the following five questions.
Now listen to the interview.

Jackie complained that nobody was doing anything to ______.
A．prevent people from having trouble with teeth
B．stop teeth from falling out
C．put men on the moon
D．transplant hearts and other organs
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