对地点提问:where are you playing the football?
对人提问:who are playing the football in the playground?
对干什么提问:what are you doing in the playground?
根据你的提问答案是:what are you doing in the playground?
对地点提问:where are you playing the football?
对人提问:who are playing the football in the playground?
对干什么提问:what are you doing in the playground?
根据你的提问答案是:what are you doing in the playground?