Study English,You do need to use English with speakers who are not teachers of English.This isn't easy,since everyone feels constrained speaking English with friends with whom it would be natural to use a shared mother tongue.Joining an English Club is a good idea and joining a club with an international membership (where English is in use at least some of the time) is,for many people,even better.If nothing like this is accessible,you might consider what would be involved in getting something going.
（500字太多,MrZang不是道是誰.）