题目

——Alice looks sad. Did you tell her about the accident?    ——Yes, but I    ______ her just before her final examinations.    A. should have told    B. shouldn’t have told   C. needn’t have told  D. must have told 答案：B小明将一个直角三角板（如左图）绕它的一条直角边所在的直线旋转一周形成一个几何体，将这个几何体的侧面展开得到的大致图形是( ) A. B. C. D.