I am a nine-year-old boy.I have a big heavy backpack.There are so many books and exercises books in it that I can hardly carry it.So my parents carry it for me every day.

　　我是一个9岁的男孩。我有一个很大很重的书包。里面装着那么多书和练习本，我几乎背不动它。因此父母每天替我背着。