单项选择题

The recent airplane crash ______ my belief that stronger safety regulations are needed.

A．infirm
B．affirms
C．firms
D．confirms
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单项选择题
The waste pipe is blocked; try ______ it out with hot water.
A．rushing
B．brushing
C．crushing
D．flushing
单项选择题
The wild animals are ______ in small cages in the zoo.
A．limited
B．bounded
C．restrict
D．confined
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