单项选择题

Generally speaking, this article is about （） .

A．a riverboat pilot
B．a printer
C．a gold miner
D．a famous writer

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填空题
A. route B. youth C. lose D. lonely
单项选择题
We are using up our natural resources too quickly and at the same time we are （） our environment with dangerous chemicals.

A. protecting
B. saving
C. polluting
D. fighting
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