单项选择题

A．Andrew’s toothache
B．teeth made of plastics
C．tooth transplanting
D．the Georgetown University Hospital
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单项选择题
A．She was sure Andrew was joking.B．She had never heard about it.C．She thought it totally impossible.D．It had never been mentioned anywher
A．She was sure Andrew was joking.
B．She had never heard about it.
C．She thought it totally impossible.
D．It had never been mentioned anywher
单项选择题
A．An equatorial belt of faster moving material.B．The solar sound.C．A sun orbiting satellite.D．An other plantet.
A．An equatorial belt of faster moving material.
B．The solar sound.
C．A sun orbiting satellite.
D．An other plantet.
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