单项选择题

A．while
B．that
C．when
D．whether
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单项选择题
A．HoweverB．NeverthelessC．In factD．In contrast
A．However
B．Nevertheless
C．In fact
D．In contrast
单项选择题
A．illegalB．identicalC．differentD．profound
A．illegal
B．identical
C．different
D．profound
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