I am on duty today is my turn to be on duty. After school, the students are out of line to go home, I am the only one left on duty in the classroom. I think: I have to clean the classroom today! I'm going to clean the blackboard, I took the blackboard cymbals up quickly. Suddenly, I saw some words on the blackboard, I think: I put these words and then read it cymbals! I read it again and then quickly put it out of the hat. But the blackboard the lower part of the upper part of cymbals cymbals finished, not to, how to do? "Yes, I can move to a bench cymbals ah." I moved a stool, and cymbals to. Cymbals finished, I found a lot of dust on my clothes, I patted, many clothes clean. I finished cymbals blackboard, the second thing is to sweep the floor. I took a long broom, sweep up. I see there are many scraps of paper, chalk, pencil shavings, I will sweep to put them into the dustbin. Not for a moment, the ground is cleaned by me. After cleaning the classroom, I went to the corridor, and after a while, I was swept away in the hallway. The last thing is to put the desks and chairs. I looked at the tables and chairs, and I put them back in a second. After the arrangement, they are not in a mess, like a row of neat rows of soldiers. I spent almost an hour. I am now back pain, but see the classroom is very clean, my heart than eating the honey still sweet, delicious.