Объяснение:
1) Have I locked the door? I have locked the door, haven't I ? Have i locked the door or the window? What have I locked?
2)Did my brother go to school when he was a boy ? My brother went to school when he was a boy , didn't he ? Did my brother go to school or to kindergarten when he was a boy? Where did my brother go when he was a boy ?
3)How soon will my daughter become an engineer?
Who will become an engineer in two years?
Will my daughter become an engineer or a doctor in two years?
Will my daughter become an engineer in two years?
2) would help (2)
3) doesn't ask (1)
4) push (0)
5) will cancel (1)