what can i do ?

I don't really know about your English Test Band 4 since its not in my country, (Philippines). English is not our primary language here but Tagalog. Because we have a law to make "English" a subject in every year level in school.. that's why I knew how to read and write english.. For you, the best thing you can do is get an English teacher. If you find it costly, then definitely it will require you lots of time.. The easiest way to learn English is to find someone who can speak English. Maybe your friends or some relatives. If you want to learn on your own, find some sites who provides English tutorials for free. Video streaming is a big help since they speak english verbally, etc. Or you can practice speaking and reading English here in mylot. There are really lots of people who are thankful in mylot since it helped improved their grammar in english,etc. Hope you can too.. Best of luck to you.

Welcome to Mylot, I have spoken to a few people that come in here to Mylot to try and improve their English, I think it is a wonderful way to do this, if you post in peoples discussion and make some of your own if you want you will be improving your English with out even knowing it, I think it is great that they are teaching English in your country, wouldn't it make the whole world a lot closer if we could all understand each other, I think it is the first stop to a close peaceful world...