请以how to keep our classroom clean为题写一篇文小短文,至少5句话w

We are middle school students.School is our home,we must keep it clean.
First,we mustn't spit anywhere,we shouldn't throw about the litter,either.
Second,we can see the wall around us is clean,so we shouldn't scrawled on the wall.
Now,let's keep our school clean !
我们是中学生.学校是我们的家园,我们必须使它保持干净.
　　首先,我们不能随地吐痰,我们不应该到处扔垃圾.
　　其次,我们可以看到我们周围的墙是干净的,所以我们不应该在墙上潦草.
　　现在,让我们保持我们的学校干净!