应该是 Where does
does his homework 是动词第三人称单数,所以需要加助动词 does ,然后把does 还原为 do .不是对 home 提问吗？？？？ home是个名字呀~你明明写着对 at home 提问嘛！at home 表示地点，应该用 where 提问。