单项选择题

According to the context tooth transplanting _______.

A．will not be realized in the near future
B．is still at a trial period
C．is but a dream
D．has been widely practiced
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单项选择题
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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