They met their friends yesterday. Did they meet their friends yesterday? When did they meet their friends? Who met their friends? Where did they meet their friends? Did they meet their friends or their parents? They met their friends yesterday, didn't they?
1) yourself
2) myself
3) herself
4) ourselves
5) themselves
1) When did you begin this exercise?
2) When did you start at school?
3) When did you go on holiday?
4) When did you celebrate your birthday?
5) When did you watch a film?
His parents are rich.
His parents aren't rich.
Whose parents are rich?
Who are rich?
Who his parents are?
Are his parents rich?
Больше нельзя задать вопрос.