单项选择题

Everything is ready, ______

A．isn't it
B．aren't they
C．is it
D．are they
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单项选择题
It is wise to set food and money ______ in case of a future emergency.
A．aside
B．to
C．down
D．up
单项选择题
He was ordered away upon a long ______ to the ice-covered south, to make war upon the natives there and rob them of their furs.
A．excursion
B．expedition
C．tour
D．voyage
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