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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单项选择题

Many economists have given in to the fatal lure of mathematics.（）

A．attraction
B．simplicity
C．power
D．rigor

单项选择题

These paintings are considered by many to be authentic. （）

A．faithful
B．royal
C．genuine
D．sincere

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