单项选择题


Passage One
Questions 26 to 28 are based on the passage you have just heard.

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.
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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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