单项选择题

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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A．According to the movement and vibrations of hot gasses.B．The trade winds blow on Earth.C．The rivers.D．The sound travel through the spac
A．According to the movement and vibrations of hot gasses.
B．The trade winds blow on Earth.
C．The rivers.
D．The sound travel through the spac
单项选择题
A．The EU would develop a strategic partnership with China.B．The EU had decided to lift the arms ban later this year.C．The EU would try to resolve the trade dispute with China quickly.D．The EU promised to intensify dialogue in all areas.
A．The EU would develop a strategic partnership with China.
B．The EU had decided to lift the arms ban later this year.
C．The EU would try to resolve the trade dispute with China quickly.
D．The EU promised to intensify dialogue in all areas.
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