单项选择题

The use of the chemical may present a certain hazard to the laboratory workers.

A．protection
B．indication
C．immunity
D．danger
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单项选择题
She is noted for her generous contribution for the relief of the poor.
A．charged
B．accused
C．famous
D．responsible
单项选择题
Supplies were parachuted into the earthquake zone.
A．suburb
B．valley
C．district
D．pine
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