there will be a birthday party on Sunday 对划线部分提问划线部分为 on Sunday_____ _____ there _____ a birthday party

问题描述:

there will be a birthday party on Sunday 对划线部分提问
划线部分为 on Sunday
_____ _____ there _____ a birthday party

When will there be a birthday party?
解说就不用了吧,你自个看得懂.