单项选择题

According to the announcement, which of the following is tree of special summer hours for the library（）

A．It has them only on the weekends.
B．It has them both weekdays and weekends.
C．It has no special summer hours.
D．This information is not availabl

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单项选择题

A．substantial
B．material
C．substantive
D．important

填空题

64（）