<u><em>Does he skate every day?</em></u> - лишнее слово do - потому что со словом he может быть только does
1. Whose car did someone break into?
2. When did they do it?
3. Where had Mark parked his car?
4.Where did Mark phone as soon as he descovered what had happened.
5.For who are the police looking.
2. He is taking him to a basketball match.
3. No, he isn't.
4. They are going to the cinema.
5. They are playing on Saturday morning.
6. They are having lunch at a nice restaurant.
7. No, she isn't.
8. They are meeting Sam.
9. They are playing tennis.