单项选择题

A．In 1858.
B．In 1850.
C．Upon Douglas’ death.
D．Shortly before the Civil War began.
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单项选择题
A．Because it takes too long to process all the applications.B．Because its resources are limited.C．Because it is a library for special purpose.D．Because there is a shortage of staff.
A．Because it takes too long to process all the applications.
B．Because its resources are limited.
C．Because it is a library for special purpose.
D．Because there is a shortage of staff.
填空题
It is an ______ which may be brown, green or black in color.
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