单项选择题

They looked both ways before ______ the street.

A．they crossing
B．cross
C．crossed
D．crossing
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单项选择题
The children kept quiet ______ they should wake up their mother.
A．lest
B．so that
C．for fear of
D．in order that
单项选择题
After an hour or two, I ______ a man riding a pony clown the street.
A．caught sight
B．caught sight that
C．caught sight of
D．caught of
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