What is the [What is the Classroom]

  Our classroom is verybright, new and clean. Whenyou go into our classroom , you can see a blackboard and a TV set on the wall . Floating silk banners are near the blackboard and a national flag is above it. There is a dais in front of the classroom. On the dais, there’re some colourful chalks and an eraser. And the name list is beside it. Near the windows, there is a“people corner”. There are some portraits, such as Marie Curie, Abraham Lincoln, Mao Yisheng and so on.
   I 崇拜 them very much . On the wallpaper, there are some mottos , like ‘Friend in need is a friend indeed’,‘One is never too old to learn’. In my classroom, there’re twenty-two desks and forty-five chairs. There are forty-four students and some teachers in our class.I love my class.
  
  ★There are nine letters in the word. The first letter is C. the last one is M, and there are two Ss and Os in it. We sit and study in it. What is it?
  (key: classroom)
  ★What is black when it is clean and white when it is dirty?
  (key: blackboard)