给定一篇文章，要求修改其中的语法和用词错误。


原文：The teacher asked the student's to write an essay about they're favorite book. The student's each choose a book and begin to write about it. There are many good books out there, but in my opinion, "The Giver" is the best one.
修改后：The teacher asked the students to write an essay about their favorite book. Each student chose a book and began to write about it. There are many good books out there, but in my opinion, "The Giver" is the best one.