the children are flying kites in the park.对fiying kites 进行提问

问题描述:

the children are flying kites in the park.对fiying kites 进行提问
[ ] the children [ ] in the park?

很高兴能够在这里回答你的问题,这道题的正确答案应该为:
(What're) the children ( doing) in the park?