单项选择题


A．which
B．what
C．why
D．that
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单项选择题
A．thenB．asC．andD．therefore
A．then
B．as
C．and
D．therefore
单项选择题
In the author's opinion,______.
A．strict traffic regulations are badly needed
B．drivers should apply road politeness properly
C．rude drivers should be punished
D．drivers should avoid traffic jams
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