单项选择题

A．that
B．how
C．which
D．where
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单项选择题
A．difficultB．complicatedC．modernD．well-known
A．difficult
B．complicated
C．modern
D．well-known
单项选择题
A．plainB．difficultC．dramaticD．simple
A．plain
B．difficult
C．dramatic
D．simple
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