Do you want to learn English well? Here (be) some advice that I can give you to make your English better. The first point is the most important. You must understand it's your duty(责任) (learn) English well! Studying English is your own duty. It isn't the duty of your teacher or your parents.
Work as hard as (impossible)! You must be active in class and practise (speak) English often in class or out of class. You should (do) all of your homework, read and study vocabulary after school
Keep studying! (not) stop for a long time such as during a summer holiday! To make progress, you should study for at least 5hours every week.
Make English study become your hobby and have fun.
You can improve your English following activities:
Reading-Find interesting English books to read.
Singing-Sing your favourite English again and again
Watching DVDs- don't you DVDs? It can make you relax yourself and improve your English.
Travelling-What about (travel) in English-speaking countries? You can learn a lot from your travelling.