问题详情：
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
【回答】
B
知识点：一般过去时及其被动式
题型：选择题
