单项选择题

A．looking on
B．looking through
C．looking up
D．looking for
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单项选择题
A．whenB．beforeC．afterD．since
A．when
B．before
C．after
D．since
单项选择题
A．searchingB．findingC．takingD．making
A．searching
B．finding
C．taking
D．making
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