The small boat was almost sunk by the dinosaurs which suddenly ________ to the surface, fighting each other, but fortunately the three men ________ get away.

A．rose; could	B．rose; were able to
C．arose; could have been able to	D．raised; could have

科目 英语   题型 单选题   难度 中等

知识点： 一般过去时的被动语态