Add the tag endings. 1) It's nice to invite British students

1) It's nice to invite British students, isn't it?
2) You are responsible for a social programme, aren't you?
3) They didn't arrange a date of the competition, did they?
4) It was a group of 17 students, wasn't it?
5) She'll stay with her partner's family, won't she?
6) The accomodation costs weren't very high, were they?