This morning I made a mistake on the way to school. Maybe I was still a little sleepy when I was waiting for the bus to school. I was so careless that I went on the wrong bus. And I didn’t find it. Ten minutes later, I looked outside the window, and then I found the road was not the one I usually went to. Then I found that I was on the wrong bus. I changed right away. But I was late for school at last.