—I traveled around China during my holidays.

【答案】What did you do during your holidays?

【解析】

答句句意：我在假期环游了中国。根据答句写问句应该用疑问代词what引导借助于助动词did来完成，在假期你做了什么？What did you do during your holidays?故答案为What did you do during your holidays?