题目

三个人步行的速度：甲为3.5km/h，乙为63m/min，丙为1m/s，比较他们的速度,则:A.V乙>V丙>V甲 ;                   B. V甲>V乙>V丙>  ;    C. V丙>V乙>V甲;                  D. V甲>V丙>V乙 . 答案：A— Tell the children _____ unhealthy food.— OK, I will. I know it’s bad for their health.A. not to eat   B. to eat  C. eat