I didn’t know .
---It’s too hot.Would you mind my opening the window?
My grandparents like to live in a house is not very big but bright and comfortable.
--- Could you tell me ? I must find him. --- Sorry, I have no idea.But he was here just now.
---Would you like camping with me? --- I'd like to.But I'm busy my homework.
Look,the boy didn’t run to catch up with the train.’