Hi there Yingying. You can find an English partner using Italki right here and begin to speak English fluently. I recommend that you click onto Find a language partner at the top, or click onto Learning English in the Language Index on the top & a list of English native speakers will appear. Then you can email /send a message to someone & arrange a time to talk.

Speaking is like acting, if you can copy (mimic) the way people speak from TV, in person, or in phone conversations. Then you can speak fluently :P Run the scene through your head, try to sound like them too if you can. I'm just giving out random ideas that might help.