Complete each sentence with the correct auxiliary verb:
1) The children ... playing a game when I came home.
2) ... you ever been to our capital?
3) We ... not have lunch at home yesterday.
4) I ... like to travel by plane.
5) We ... already finished our work.
6) The children ... go to the museum next week.
7) It ... not raining two days ago.
8) My mother ... not enjoy match at school.
9) ... your little sister go to school?
10) Ben ... be hungry after the match.
11) ... you go to the swimming pool last year?
12) How long ... Kate been playing the piano?
13) Who ... left his bag here?
14) Bill ... not dance.