题目

—Sir, could I hand in my homework a bit late? — __________, since you've been unwell these days. A . You can't be serious B . I'm afraid not C . Good idea D . Well, all right 答案：D14、正方形ABCD在平面直角坐标系中的位置如图所示，已知A点坐标（0，4），B点坐标（-3，0），则C点坐标（1，-3）．