Complete the sentences with the question tags in the box didn' they, can she, haven't they doesn't he, does he, can't she, aren't we 1 he doesn't know the answer, ? 2 we're really late, ? 3 she can wait, ? 4 they knew all the answer, ? 5 your father works in that office, ? 6 your sister can't cook, ? 7 they've finished their test, ?