Learn American English Pro HD 出国旅游商务外贸必备英语 日常用生活口语对话专业版 app for iPhone and iPad
Learn American English is designed to help native speakers of any language speak better English. Over 300 of the most-used American English idioms and phrases are presented in engaging dialogue, with plenty of usage examples, illustrations, and lots of exercises -- with convenient answer key -- to help you learn the material.