帮我找下这几篇英语短文改错的错处,并改正,一定写明原因,

Before he was a teacher,Bob told me what he 1去what---------- would like to be doctor when he was at school 2---在doctor前加a---- He worked very hard in his lessons and tried to 3-in改at------ enter into a famous university ,but something unhappy 4--into去掉---- happened in his family,which made necessary for him to 5在necessary前加it做形式宾语------- make a living early by himself .As a young man,he had 6--As改为Being---- been a bus driver ,a dustman and a salesman.but he spends 7-spends改为spent------ his spare time studying and finally becoming a college 8--becoming变为became----- teacher."Young people,"he ofthen said ,"should full of 9----在full之前加be----- wishes and dreams after they go into society." 10 -after改为before------ 第二篇 Dear Li Ping,You have no idea how sadly felt when I learned you 1--sadly改为sad------ failed in the exam.I would like to talk to you how to make 2---在how前加about--- progress in English study .learn a foreign language with 3--learn改为learning---- less reading and without reading will make you never 4---and-改为or-- master the spirit of it.You should make your theory 5---combine改为combined- combine with practice.Trying to get advice on 6-Trying改为Try----- English learning from the people around you.Never to be 7--be--去掉-- satisfied when you are praised for even little progress.8--little前-加上a---- I am sure you will be good in English before long.9in-改为at------ Hope you success next time.10--Hope改为Wish---- 第三篇 One day ,I was cooking in the kitchen as the telephone.1-as改为when----- in the sitting -room rings.I went to answer it immediately.2--rings改为rang--- She was my close friend,Lisa.When we were talking 3---She改为It---- on a phone ,the fire alarm sounded.I ran back to the 4--a改为the----- kitchen.the room full of smoke and the beef was 5--full前加was---- badly burnt.I quickly turned aff the gas,opening all 6--opening改为opened--- the windows,and then went out of the house.In my surprise,7--In 改为To- Isaw two fire engines parking outside my house.I 8------ was rather worried.Itold about the firemen that 9-about去掉------ my carelessly cooking had caused the heavy smoke.10--carelessly改为careless------ 第四篇Mr.Smith is our English teacher.He is from America,1--He改为who----- and he has been live in China for many years.We 2---live改为living--- asked him when he came to China."Well,China is a 3----- wonderful country with long histery.I like Chinese 4----long前加a---- cultures and the people there ,"he replied.He fell in 5---cultures改为culture--- love a Chinese girl two years ago.Luckil
y,the girl also 6-love后加with----- loved him .They got married soon and is expecting 7---is-改为are-- their first baby now .we are really interested at the baby is 8-at改为in----- look.Mr Smith said that he would go back to America 9 --would后加not----- again."My family is here and I do like China,"said him.10--is改为are---