—She cooked on a fire.

A.What did she do yesterday?B.What is she doing?C.Did she cook on a fire?

【答案】A

【解析】

句意“—她昨天做什么了？—她在火上做饭。”根据答语，可知句子是一般过去时，排除B；C选项要用yes或no回答，排除C。故选A。