根据文意及首字母提示补全单词。

Our school is very big. There are many kof trees and flowers here, so the air here is very c. I can hear birds singing. It's so w. The playground is green. You can see the students play basketball a class on the playground, Sometimes our teachers play wus. We f very happy. In each classroom, there are many pictures on the wall. Every student w very hard in our school. Our teachers are very k to us. They often help us with our l. Also, they enjoy c with us after school. In our school, the teachers and students are like friends. I love our school. Our school will get more and more beautiful!