题目

一个几何体的三视图如图所示，则这个几何体的体积等于（    ）        A．       B．        C．       D． 答案：D   解析:由三视图可知,几何体为正方体切一角故 The reason ___ he can’t come is ______ he has to work late. A. because; that      B. that; that              C. why; that  D. why; because