单项选择题

A) down C) up B) over D) under

A．down
B．over
C．up
D．under
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单项选择题
A) which C) on which B) at which D) in which
A．which
B．at which
C．on which
D．in which
单项选择题
A) as C) like B) for D) about
A．as
B．for
C．like
D．about
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