单项选择题


Questions 22 to 25 are based on the conversation you have just heard.

A．For almost a thousand years.
B．For a few decades.
C．For a century.
D．For several years.
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单项选择题
A．By filtering sea water.B．By treating sea water with chemicals.C．By taking salt out of sea water.D．By drying up sea water.
A．By filtering sea water.
B．By treating sea water with chemicals.
C．By taking salt out of sea water.
D．By drying up sea water.
单项选择题
A．He wants to live off campus.B．There are advantages and disadvantages to living off campus.C．Living space in the dorm is crowded.D．There are only a few apartments available off campus.
A．He wants to live off campus.
B．There are advantages and disadvantages to living off campus.
C．Living space in the dorm is crowded.
D．There are only a few apartments available off campus.
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