题目

 Had he not been so busy taking the diamonds, he _________ the blow.   A. had been feeling                        B. would feel   C. would have felt                         D. had felt 答案：C点A表示数轴上的一个点,将点A向右移动7个单位,再向左移动4个单位,终点恰好是原点,则点A表示的数是        .