单项选择题

The waste pipe is blocked; try （） it out with hot water, or just call the plumber to do it.

A．flushing
B．crushing
C．brushing
D．blushing

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单项选择题
The thought that any parent would （） their child into seeking fame just appalled me.

A．authorize
B．revive
C．manipulate
D．supervise
单项选择题
You could pay half of the rent right now, while the （） must be paid by the end of this month.

A．remainder
B．remains
C．remnant
D．reservation
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