Question

【题目】She could ride a bike when she was only five years old.（对划线部分提问）
could she when she was only five years old?

Answer 1

【答案】What；do
【解析】句意：她仅仅五岁时就会骑自行车了。ride a bike骑自行车，对其提问要使用句型“What +be/助动词/情态动词+主语+ do？”这一句型，所以答案是(1). What (2). do。