【正确答案】正确答案：The imparting of knowledge may not be the only advantage of school education. The greatest advantage probably lies in offering the opportunity of making friends. Only when I graduated from school did I realize the advantage whose significance I have become deeply aware of in the recent years. I bitterly regretted frittering away my school life without making many friends. Recently, every morning and night, no matter when I saw young students with bags walking in twos and threes, hand in hand or shoulder to shoulder. I was always envious of their friendship and inwardly gave them my heartfelt wishes.