单项选择题


A．it had
B．to have been
C．it to be
D．it was
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单项选择题
A．aboutB．to beC．asD．alike
A．about
B．to be
C．as
D．alike
单项选择题
A．made outB．looked toC．clear upD．classify
A．made out
B．looked to
C．clear up
D．classify
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