Помогите пожалуйста не понимаю буду благодарен!) ^_^

Topsy and Betty want to go to school and they need your help. Write a letter to them and answer their questions.
What can I say when ... ?
- I want to come in;
-I want to answer a question;
-I want to ask a question;
-I want to close the window.
TO: Topsy and Hetty
FROM:------------
Hi, Topsy and Hetti,
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 answer a question, say,__________________________________________________________________
When you want to close the window, say,_____________________________________
You may do it when your teacher says, "Yes,___________________________________
You Justin's do it when your teacher says, "No,_________________________________
Bye-bye!
_____________________________________________________________________

1. - May I come in?    - Can I answer?    - Can I ask?    - Could I close the window?2.Yes, you can.    No, you can`t.    Я не очень поняла задание, поэтому насчет ответа я не уверена.