Am, are или is? Что вставить? Who.... she? She.... his sister. What.... she? She..... a doctor. Who...... you? I.....

Who is she? She is his sister. What is she? She is a doctor. Who are you? I am his friend. What are they? They are pilots. Who are they? They are my friends.

1. Anton is a pilot. - What is Anton? 2. Anton is my brother. - Who is Anton? 3. Nina is his sister. - Who is Nina?