单项选择题

A．treated
B．had been treated
C．had treated
D．was treated
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单项选择题
A．HoweverB．WhenC．AlthoughD．Meanwhile
A．However
B．When
C．Although
D．Meanwhile
单项选择题
A．statusB．organizationsC．ranksD．classification
A．status
B．organizations
C．ranks
D．classification
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