Выберите правильное окончание. 1. his name is peter, (isn't it, is it.)2. your brother is not a doctor,(isn't he, is he.)3. the 1st of september was a wonderful day,(was it, wasn't it.)4. the children were not at school in the afternoon,(were they,weren't they.)5. you enjoy tennis,(do you,don't you.)6. you don't swim in autumn,(do you,don't you.)