单项选择题

The jobs of wildlife technicians and biologists seemed （）to him, but one day he discovered their difference.

A．identical
B．vertical
C．parallel
D．specific

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单项选择题
Please don't （）too much on the painful memories. Everything will be all right.

A．hesitate
B．linger
C．retain
D．dwell
单项选择题
Their claims to damages have not been convincingly （）

A．refuted
B．depressed
C．overwhelmed
D．intimidated
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