Ответ:

1)It's cold outside, isn't it?

2)We're planning our vacation, aren't we?

3)You need my help, don't you?

4)He told Suzie about his new book, didn't he?

5)This holidays were awesome, didn't they?

6)Your costume is great, isn't it?

7)Fred's mom always tells us funny stories, doesn't she?