Topsy and Hetty want to go to school and they need

Topsy and Hetty want to go to school and they need your help. Write a letter to them and answer their questions.
What can I say when...?
1. I want to come in...
2. I want to answer a question...
3. I want to ask a question...
4. I want to close the window..
Hi, Topsy and Hetty
I'll tell you what you can say to your teacher.
When you want to come in, say, "May I come in?"
When you want to ask a question, say.........
When you want to close the window, say................
You may do it when your teacher says, " Yes, .....
You mustn't do it when your teacher says, " No,........
Bye-bye!