Clean the blackboard - 擦黑板英语作文100字

　　Everyone is in the classroom on Wednesday morning. The third class was over and the teacher went out of the classroom. The class went to play. I saw the blackboard full of words. So I picked up the blackboard and cleaned it.

　　I cleaned the blackboard carefully. I'm afraid of dust polluting the air. I cleaned the blackboard and cleared the desk. The teacher praised me after he knew it.