单项选择题

You（）.yesterday if you were really serious about your work.

A．ought to have come
B．ought have come
C．would come
D．ought to be coming

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单项选择题
Were all three people in the car injured in the accident No,（）only the two passengers who got hurt.

A．there is
B．it were
C．there was
D．it was
单项选择题
Volcanoes (火山)（）as active, dormant and extinct.

A．described
B．are described
C．being
D．which are described
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