英语翻译As I am now sixteen years old,I have a great many friend

英语翻译
As I am now sixteen years old,I have a great many friends.But one of them I like best of all.I've known him since I was a middle school student.He is a man of a sweet and soft temper,but he looks very solemn (严肃).He sometimes appears very old and sometimes very young and bright.But he is always clever.He is pleased by all who know him.
He is a learned man.He knows everything.Moreover,his memory is very good.He remembers whatever has happened in the world.He is also a great teacher.He has taught millions of young men.Therefore,he is known to everybody.
He is my best teacher rather than my best friend.When I began to go to school,he taught me how to read and write.When I was at middle school,he began to teach me English,history,geography,physics,maths and chemistry.
My friend is a patient（有耐心的）man,indeed.Stupid as I am,he is never tired of teaching me.He is always ready to teach me till I am perfectly familiar with my lessons.But there is one thing which you may be surprised to know.Though I have lived with him for a long time.I've never heard his voice.Whenever I ask him questions,he never answers them with his mouth,but shows me the answer on his face.
He is not only my best friend,but the best friend of many others,including you of course.I' m sure you also know him quite well and your love for him is great.
What is this man then?
I have a great many friends.改为：I have a good many friends.

我16岁了,有很多朋友,但有一个我最喜欢了.我和他很早就认识了.他是个外刚内柔的人,时而显得很老气横秋,时而又神采飞扬.但不管怎么说,他总是很聪明,所以认识他的人都喜欢他.
他上知天文,下知地理.更重要是,他记性很好!似乎世界上发生的事他都能记住.同时他是个好老师,桃李满天下.可以毫不夸张地说“天下无人不识他”.
他是我的良师胜过益友.我刚入学时,他教我读写.上了初中他开始教我英语、历史、地理、物理、数学和化学.
我的这位朋友实在很有耐心.虽然我很笨,但他总是诲人不倦.他总是教到我对功课了然于心为止.但有件事你可能会觉得惊讶——虽然我和他一起生活了很久,但是我从来没有听过他的声音.无论什么时候,我问他问题时,他只是在他脸上告诉我答案,从来不用嘴巴来回答.
他不单单是我的益友,也是其他人的,当然也是你的咯.你肯定很了解他,而且崇拜他,这我敢打包票.
那么,他到底是谁呢?
（字典吧?
补充一下,开头说,我和他中学就认识了,后面有一句说我刚入学的时候,他教我读写,有点矛盾哦,所以开头部分翻译成很早就认识了.（我也是检查了才发现的.）