题目

When I was 8 years old, I once decided to run away from home. With my suitcase   36   and some sandwiches in a bag, I started for the front door and said to Mom, “I’m leaving.” “If you want to   37  , that’s all right,” she said, “But you came into this home without anything and you can leave the same way.” I   38   my suitcase and sandwiches on the floor heavily and started for the door again. “Wait a minute,” Mom said. “I want your   39   back. You didn’t wear anything when you arrived.” This really angered me. I tore my clothes off—shoes, so 某班体育委员统计了全班45名同学一周的体育锻炼时间，并绘制了如图所示的折线统计图，则在体育锻炼时间这组数据中，众数和中位数分别是（    ）   A．18，18 B．9，9    C．9，10   D．18，9