10．
Read the passage and fill in the blanks with proper words.
When I was young, I studied at a boy school. We were all b thirteen and eighteen. Our headmaster was an old man. He was kind, but all of us were a of him. For example, we were playing, t and laughing, when he came in, the classroom became quiet at once. If a boy didn't finish his homework well or carefully, he would be very angry and asked the boy to do it a. But his grandson told us that he never did things l that at home.
