—What does your mother do?—She is ___. 

       the teachers in their school is about 200 and most of them are          teachers.

 -- Could you tell me something about the boy who helped you just now? -- Sorry, I know nothing about him. We are______.

Last week, they held the charity show to raise money for the ______ of the earthquake.

Edward, you have grown up. You should learn to make your own room _____ .