四年级英语作文：It is a good friend250字

　　I have a backpack. It is large and it is blue.
　　It is a birthday gift from my parents. I love it very much.
　　It is very "hard-working", because I keep all my school things in it.
　　It is very heavy.
　　It is with all the time during school days.
　　It is a good friend of mine.