Ответ:
1) Does Jane eat lunch at the canteen every day?
2) Did I/you sleep well last night?
3) Are you studying your grammar book now? / What are you doing now?
4) Were the children watching TV last night?
5) Was it cold yesterday?
6) Will he be at home tonight?
7) Does she play the piano?
8) Do they have many children?
9) Did he travel to Spain last year?
10) Does she feed his cat three times a week?