单项选择题


A．on that
B．on which
C．at that
D．at which
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单项选择题
A．in the event ofB．in the ease ofC．with a view toD．with reference to
A．in the event of
B．in the ease of
C．with a view to
D．with reference to
单项选择题
A．howeverB．neverthelessC．soD．therefore
A．however
B．nevertheless
C．so
D．therefore
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