单项选择题

The Japanese used to（）ten million tons of coal each year.

A．extract
B．contract
C．subtract
D．constrain

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单项选择题

Richard was his father's only （）, as he had no brothers or sisters.

A．offspring
B．heritage
C．heir
D．heiress

单项选择题

There is not much （） in this building; you can hear what a person in the next room is say ing quite clearly.

A．personality
B．privacy
C．privilege
D．priority

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