单项选择题

To find out how the bees managed to tell time, an unusual experiment was _______ four years ago.

A．carried on
B．carried away
C．carried out
D．carried out
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单项选择题
An Olympic runner wins a _______.
A．medal
B．model
C．modle
D．modest
单项选择题
Within days he became paralyzed, and people feared that he might die. But he _________.
A．absorbed
B． dissolved
C． discovered
D． recovered
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