单项选择题

It is essential to reserve a computer three days in advance if you want to use one.
GIVEN

A．真
B．假
C．NOT

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单项选择题

The information desk is closed at weekends.
GIVEN

A．真
B．假
C．NOT

单项选择题

The library runs courses for people who want to learn about computers.
GIVEN

A．真
B．假
C．NOT