单项选择题

A．as
B．to
C．on
D．for
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单项选择题
A．there areB．they areC．there isD．it is
A．there are
B．they are
C．there is
D．it is
单项选择题
A．searchingB．searching forC．searching inD．searching into
A．searching
B．searching for
C．searching in
D．searching into
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