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1. The children could help you, couldn't they?
2. The children go there every day, don't they?
3. The children went there every day, didn't they?
4. Sam wrote the exercise, didn't she?
5. We have got something to tell her, haven't we?
6. There is something interesting in the box, isn't there?
7. Mrs Smith spends her holidays in Finland, doesn't she?
8. Mr White spent his holiday in London, didn't he?
9. Helen sent a lot of postcards, didn't she?
10. Helen sends a lot of postcards, doesn't she?