1.
A: Is the postman opening a letter?/ The postman is opening the letter, isn't he?
B: No, he isn't. He's delivering a letter.
2.
A: Is she watering the flowers?
B: No, she isn't. She's planting a flower.
Ответ: 1 - составлен вопрос и дан ответ, 2 - составлен вопрос и дан ответ.