小胖今年10岁，爷爷的年龄是小胖的7倍少3岁，爷爷今年几岁？
10×7-3=67（岁）；
答：爷爷今年67岁．
223. Lu Xun once said that the _____ are made by people. That’s so-called “Where there is a will, there is a way”.
A．paths
B．ways
C．tracks
D．Roads
电机车司机不得擅自离开工作岗位，（）在机车行驶中或尚未停稳前离开司机室。
A、严禁
B、必须
C、可以
