Выберем правильную форму глагола "to be" для каждого предложения. Напомню, что формы глагола "to be" в Present Continuous: am (для I), is (для he, she, it), are (для you, we, they).
- I am writing a letter to my sister now.
- You are watching a very interesting movie.
- Jane and her dog are walking in the park.
- My brother is sleeping on the couch.
- My parents and I are going on a vacation.
- The two girls are dancing on the stage.
- Jessy is taking pictures.
Ответ: смотри решение выше.