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
It is of the utmost importance that you ______ here on time.
A．be
B．shall be
C．are to be
D．must be
单项选择题
The gloves were really too small, and it was only by ______ them that I managed to get them on.
A．spreading
B．extending
C．squeezing
D．stretching
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