单项选择题

A．Uses of cold sea water.
B．Irrigating desert areas.
C．Techniques for preserving the environment.
D．Techniques of cultivating plants.
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单项选择题
A．Before breakfast.B．Late morning.C．Mid-afternoon.D．Late evening.
A．Before breakfast.
B．Late morning.
C．Mid-afternoon.
D．Late evening.
单项选择题
A．Learning knowledge of the language.B．Reading newspapers and magazines of foreign language.C．Communicating with the native people.D．Living in a country where the language is spoken.
A．Learning knowledge of the language.
B．Reading newspapers and magazines of foreign language.
C．Communicating with the native people.
D．Living in a country where the language is spoken.
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