对I划线提问,为：Who will make model planes with his classsmates on Sunday?
对model planes划线提问,为：What will you make with your classmates on Sunday?
对my classmates划线提问,为：Who/Whom will you make model planes with on Sunday?或 With whom will you make model planes on Sunday?
对on Sunday划线提问,为：When will you make model planes with your classmates?
对make model planes划线提问,则为：What will you do with your classmates on Sunday?