单项选择题

A man escaped from the prison last night. It was a long time（）the guards discovered what had happened.

A．before
B．until
C．since
D．when

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单项选择题

He is mentioned in the chapter and also in（）that proceeds.

A．the one
B．it
C．which
D．what

单项选择题

I wish I（）longer this morning, but I had to get up and come to class.

A．could have slept
B．might have slept
C．slept
D．have slept

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