单项选择题


A．which
B．what
C．that
D．it
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单项选择题
A．overB．onC．underD．behind
A．over
B．on
C．under
D．behind
单项选择题
A．looking forB．looking intoC．looking afterD．looking over
A．looking for
B．looking into
C．looking after
D．looking over
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