) You can't believe it,can\can't you?
2) She hasn't arrived yet,has\hasn't she?
3) The problem was too complicated,was\wasn't it?
4) They are playing tennis,are\aren't they?
5) They water in the pond is too cold,is\isn't it?
6) She hasn't written the letter,has\does she?
7) She doesn't like taking photos,has\does she?
8) The story has been very interesting,isn't\hasn't it?
9) Your pen friend isn't polite,is\isn't he?
10) Our cousins won't go out tomorrow,will\won't they?