单项选择题

Contrary to my expectations, the experiment ended ________ failure.

A．at
B．to
C．in
D．till
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单项选择题
It took a week of investigation to get a reasonably ________ account of the accident.
A．accurate
B．precise
C．strict
D．positive
单项选择题
In spite of all effort the doctors had done, her burns refuse to ________.
A．heal
B．revive
C．recover
D．survive
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