a)
1. This morning is lovely. Isn't it?
2. It is warm today. Isn't it?
3. It was cold yesterday. Wasn't it?
4. You are sure of it. Aren't you?
5. The matter is personal. Isn't it?
6. They were unemployed last year. Weren't they?
b)
1. They live in the country now. Don't they?
2. He always wears a tie when he goes to work.Doesn't he?
3. He paid his bill. Didn't he?
4. The weather remained cold during the day. Didn't it?
5. It rained yesterday. Didn't it?
6. They met at the restaurant. Didn't they?
7. You got the information from the internet. Didn't you?
8. He lost his documents. Didn't he?
c)
1. They can speak German. Can't they?
2. Nick must tell us the truth. Mustn't he?
3. Jack can also come with us. Can't he?
4. She must get a job. Mustn't she?
5. He can help you today. Can't he?
6. It may rain in the evening. May not it?