单项选择题

The word smog is a product of______.

A．Invention
B．compounding
C．abbreviation
D．blending
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单项选择题
Which is the smallest of all the states in America
A．Hawaii.
B．Washington D-
C． Texas.
D．Rhode Islan
单项选择题
The author may regard risks as something______.
A．tragic
B．dangerous
C．unavoidable
D．promising
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