1 The librarian recommended you to take this book, didn't he ?2 The book is very difficult for you, isn't it?3 You haven’t missed the lessons this month,have you?4 You don't rememder me, do you?5 They don't use this room, do they?6 She will be able to come to dinner with you,won’t she?7 Your son likes music, doesn't he?8 You don't have to wake up your children in the morning,do you?9 He can’t sunbathe all day long, can he?10 You are going to the theatre today,aren’t you?11 I'm right,ain’t I?12 I won’t have to stay here for long,will I?