单项选择题

I'm sorry I'm late, I was held up in a traffic ().

A．block
B．group
C．jam
D．bunch

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单项选择题
—She was in class on Friday afternoon, but no one has seen her since.—She () an accident.

A．might have
B．might have had
C．may have
D．ought to have had
单项选择题
The boys looked for the ball for a while in the playground, but finally gave () are went home.

A．up
B．out
C．away
D．off
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