Dear Li Ping, From your letter, I know you have some trouble with English study. I am very glad to give you some advice.In your letter you said you couldn’t understand people who talked fast. I think you should try to improve your listening skills. Firstly, you should listen to tapes half an hour every day. In my opinion, you’d better write down what you hear from the tapes. Secondly, you can practice conversations with native speakers of English. Thirdly, I suggest you should watch English movies. That is a secret to imrove your listening skills.As for your pronunciation, what about reading aloud to practice it? You could also listen to tapes and read after tapes. Day by day ,you can get your pronunciation right. You also said you found English grammar very difficult. Then why not listen to the teacher carefully and take grammar notes in every class? You can also make original sentences using the grammar you are learning. That wll help you a lot. Practice makes perfect(熟能生巧). I hope you can improve your English a lot through your hard work