单项选择题

My bike is at your ______ You can use it any time you like.

A．control
B．request
C．service
D．mercy
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单项选择题
I want you to describe all the events of that morning in ______.
A．priority
B．urgency
C．time
D．sequence
单项选择题
Two of the girls have to share one bed, but the other three have______ones.
A．singular
B．separate
C．private
D．different
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