-Someone’s knocking at the door. Is it your mother?-No, dad. It _____be mom. I saw mom ____in the bedroom just now.
- It's very hot in the room!-_______ the door open?
- Can you go to row a boat with us this afternoon?- I'm afraid not. I_______ look after my little sister because my mother is out.
In spring, we can often hear some birds_______ in our school.
——Why not go to see a film? ——That ____ a good idea! Let’s go.
We read 10 ,206 like this________.