单项选择题

You'd better put these documents in a safe place.（）

A．dark
B．secure
C．guarded
D．banned

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单项选择题

I'm working with a guy from London.（）

A．teacher
B．student
C．friend
D．man

单项选择题

The policemen acted quickly because lives were at stake.（）

A．in danger
B．in difficulty
C．in despair
D．out of control

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