题目

I thought he          to see his mother if he          time.       A．will go…has B．will go …will have C．would go …would have  D．would go …had 答案：D从高为5m处以某一初速度竖直向下抛出一个小球，再与地面相碰后弹起，上升到高为2m处被接住，取向下为正方向．则在这段过程中A.小球的位移为7m，路程为3mB.小球的位移为3m，路程为7mC.小球的位移为-3m，路程为7mD.小球的位移为-7m，路程为3m