单项选择题

He ______ between life and death for a few days but then he pulled through.

A．hovered
B．lurched
C．wavered
D．fluctuated
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单项选择题
Presently, there are nine teachers in my team, who have ______ the task of teaching advanced English to more than 500 non-English majors.
A．inclined
B．hesitated
C．afforded
D．undertaken
单项选择题
The two witnesses who saw the shootings were able to ______ who hard fired first.
A．encounter
B．highlight
C．testify
D．identify
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