Ответ:
1. The Smiths are collecting rubbish, aren't they?
2. My sister can speak French, can't she?
3. They study at a secondary school, don't they?
4. John has passed the exam, hasn't he?
5. My parents cleaned out the pond, didn't they?
Объяснение:
Как строятся подобные вопросы:
<Основное предложение>, <глагол помощник в противоположной форме> <местоимение, обозначающее подлежащее в основном предложении>?
You (do) have a hamster, don't you?
You don't like eating soup, do you?
Mark Zuckerberg is the richest person in the world, isn't he?