单项选择题

If any difficulties _______ , you can call me for help.

A．arise
B．happen
C．occur
D．take place
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单项选择题
She walked 7 miles today in order to lose weight; I never imagined that she could walk _______ far.
A．as
B．such
C．that
D．very
单项选择题
You won't be able to finish the job _______ you stop playing around.
A．unless
B．lest
C．in case of
D．so that
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