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．Taos Pueblo.B．Apache.C．Navajo.D．Ute.
A．Taos Pueblo.
B．Apache.
C．Navajo.
D．Ute.
单项选择题
A．Cancel their assignment.B．Allow them to hand in their assignment a few days later.C．Help them to write part of the assignment.D．Explain to them what the assignment was.
A．Cancel their assignment.
B．Allow them to hand in their assignment a few days later.
C．Help them to write part of the assignment.
D．Explain to them what the assignment was.
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