11. What’s one plus two? It’s three.
12. I think it will rain tomorrow.
13. Who’s this? This is Tom.
14. What can you see? I can see a beautiful garden.
15. There are many people in the classroom./
There is a pencil on the desk.
16. What colour is it (are they)? It’s (They’re) red.
17. Whose pen is this? It’s mine.
18. What time is it? It’s ten 'o clock.