单项选择题

Academic records cannot be duplicated.（）

A．borrowed
B．purchased
C．copied
D．rewritten

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单项选择题

John was irritated by the necessity for polite conversation.（）

A．troubled
B．annoyed
C．threatened
D．aroused

单项选择题

Ten years after the event, her death still remains a puzzle.（）

A．mist
B．fog
C．secret
D．mystery

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