单项选择题

A lot of people could fall ill after drinking contaminated water.

A．muddied
B．polluted
C．mixed
D．troubled
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单项选择题
The price of vegetables fluctuatesaccording to the weather.
A．jumps
B．rises
C．falls
D．changes
单项选择题
It is absurdto predict that the sun will not rise tomorrow.
A．ridiculous
B．funny
C．odd
D．foolish
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