单项选择题

A．Too much algae.
B．Excessive recreational use.
C．Lack of adequate rainfall.
D．Too much evaporation.
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单项选择题
A．In a library.B．In a bank.C．In a supermarket.D．In a grocery stor
A．In a library.
B．In a bank.
C．In a supermarket.
D．In a grocery stor
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