短文改错。给定一个短文，找出其中的语法错误并予以改正。


短文：
John have been studying Chinese for two years. He likes to read and watch Chinese movies to improve his language. His best friend, who name is Susan, also study Chinese with him. They enjoy practicing together and often go to Chinese restaurants to practice their speaking.
John has been studying Chinese for two years. He likes to read and watch Chinese movies to improve his language skills. His best friend, whose name is Susan, also studies Chinese with him. They enjoy practicing together and often go to Chinese restaurants to practice their speaking.