单项选择题

A．Eight words.
B．Ten words.
C．Twenty-four words.
D．Forty-eight words.
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单项选择题
A．Too much algae.B．Excessive recreational use.C．Lack of adequate rainfall.D．Too much evaporation.
A．Too much algae.
B．Excessive recreational use.
C．Lack of adequate rainfall.
D．Too much evaporation.
单项选择题
A．For a few days.B．For a few weeks.C．For a few months.D．For almost a year.
A．For a few days.
B．For a few weeks.
C．For a few months.
D．For almost a year.
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