Ответ:
1 What did you do at your history lesson?
2 How many pupils are there in your class?
3 Is there anybody in the classroom?
4 Would you like to live in another country?
5 We sometimes stay at school late.
6 There were 20,000 people at the football match.
7 My mother is not at home, she is at work.
8 Were there many familiar people at the concert?
9 I have seen a brilliant play at the theatre.
10. You can watch a hockey match on TV today.