用what造15个从句

1. What is done can not be undone.
2. What matters is that we should learn from each other
3. This is what I want to say.
4. What he said is just like what I want to say.
5. I know what he is doing now。
6。I have no idea what you are doing now.
7。What I said is all correct.
8. Do you know what is going on over there?
9. What is it that you want to tell me the secrete?
10.It is what the teacher said that made her so happy.
11.I will give you what I have.
12.Just tell me what you want.
13.What is the matter with her is still unkown.
14.What the teacher want us to do is to clean the classroom.
15.What I could do is to finish these fifteen sentences.