题目

The teacher came to the classroom and demanded ____ what had happened. A. his students to tell him      B. being told C. telling him                 D. to be told   答案：Ddemand可接to do sth，但不能接sb to do sth。该处为被动，故为to be told。7．如图：每个小方格的面积是1平方厘米，那么阴影部分的面积就是2平方厘米，阴影部分面积是总面积的$\frac{（\;\;\;\;）}{（\;\;\;\;）}$．