题目

读大洲轮廓图，若把这四个大洲画成图幅相等的地图，则所用比例尺由大到小排序正确的是（ ） A . ①②③④ B . ④③②① C . ③②①④ D . ①③②④ 答案：B----- How did you do in the test ? ----- Not so well. I ______ much better but I misread the directions for Part D. A. could have done     B. could do           C. must have done             D. should do