Complete the sentences with the question tags in the box didn' they, can she, haven't they doesn't he, does he, can't

1. He doesn\'t know the answer, does she? 2. We\'re really late, aren\'t we? 3. She can wait, can\'t she? 4. They knew all the answers, didn\'t they? 5. Your father works in that office, doesn\'t he? 6. Your sister can\'t cook, can she? 7. They\'ve finished their test, haven\'t they?