Ответить на вопросы на английском. What are you doing?. What is your friend doing?. What is your teacher doing?. What are your classmates doing?

What are you doing? I'm writing the sentence.

What is your friend doing? My friend is reading his classbook.

What is your teacher doing? My teacher is explaining the new topic.

What are your classmates doing? My classmates are listening to our teacher.