单项选择题

A．To pull a train.
B．To drive a paddle steamboat.
C．To get water from ground and turn the wheels of mills.
D．To do nothing.
<上一题 目录 下一题>
热门 试题

填空题
Observation posts have been set up alongside the most dangerous craters to ______.
填空题
Hot mineral springs could be used ______.
相关试题