Дайте краткие ответы на вопросы, следуя образцу, образец: is kovalev present at the lesson? yes,he is. no he is not. is tverskaya sreet long? was it cold last winter? are yourfrend's sister beautiful?

Was is cold last winter? Yes. it was
Is Tverskaya Street long? Yes. it is/no,it isn't
Are your friend's sister beautiful?Yes,she is