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

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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
单项选择题
It was necessary to()the movie Roots into five parts in order to show it on television.

A．adapt
B．abridge
C．segment
D．transact
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