单项选择题

What might be the best title for the passage

A．Oil Refining: A Historical Perspective.
B．Kerosene Lamps: A Light in the Tunnel.
C．The California Gold Rush: Get Rich Quickly.
D．Private Property: Trespassers will Be Prosecuted.
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单项选择题
The author mentions all of the following as possible prod nets of crude oil EXCEPT ______.
A．gasoline
B．kerosene
C．wax
D．plastic
单项选择题
The writer of the article was, undoubtedly ______.
A．a linguist
B．an attorney
C．a scientist
D．an essayist
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