1) Thereare a lot of good museums in Moscow, aren't there?
2) Lena is a theatregoer, isn't she?
3) Some of the best Russian paintingsare in the Tretyakov Gallery, aren't they?
4) It is very interesting to look at painting, isn't it?
5) I am right, aren't I? (am not I не используется в хвостике разделительного вопроса)