单项选择题

Academic records cannot be duplicated. （）

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

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单项选择题

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

A．annoyed
B．troubled
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．mystery
D．secret

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