单项选择题

The service operates 36 libraries throughout the country, while six ______ libraries specially serve the countryside.

A．mobile
B．drifting
C．shifting
D．rotating
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单项选择题
Closer economic ties have been ______ greater diplomatic warmth.
A．translated
B．transferred
C．transplanted
D．transmitted
单项选择题
Living in the northern part of the country has its problems, ______ obtaining fresh water is not the least.
A．with which
B．for which
C．of which
D．which
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