—He did homework.

A.What does he do?B.What did he do yesterday?C.Where did he go yesterday?

【答案】B

【解析】

句意为“—________？—他写作业了。”A选项“他是做什么的？”B选项“昨天他做什么了？”C选项“昨天他去哪里了？”根据答语可知AC选项错误，故选B。