Объяснение:
№1
1. is
2. am
3. Are
4. are
5. is
6. is
7. are
№2
1. Where is my breakfast?
2. Who is that old man?
3. Are they a teacher and a pupil?
4. How old are you?
5. What is the weather like today?
6. Why are you always late for school?
7. Are tomatoes fruit?
№3
2. Summer is the hottest season
3. I am at home now.
4. Sometimes I late for school because I get up late
5. It is spring now
6. Now it is 18 o'clock
7. My favourite colour is green/blue/red/yellow