容易引起泵跳闸的原因是：（）。
A、润滑油不足
B、冷却水温度高
C、泵负荷过大
参考答案：C
Rick, this is my notebook. Where is _____? [ ]
A. his
B. yours
C. mine
The murderer tried to run away from the prison but he ______ getting caught by the police.
A．ended up
B．went against
C．started with
D．got through
