1. We are in Year 4 now.
2. This is our new cooker.
3. My friends are in the park now.
4. Where are the children? They are in the playroom.
5. What is your favourite day? — It is Saturday.
6. It is rainy.
7. Look! She is making a sandcastle.
8. Is he at school? — No, he and his sister are at home.
9. The women are playing a game in the garden.
10. Ben, where are you? — I am watching TV in the living room.
Правило: используйте $"am"$ с I, $"is"$ с he/she/it и единственным числом, $"are"$ с we/you/they и множественным числом.