https://teacherpresto.com/business-english-for-advanced-levels/
Business English for advanced levels
In this course we'll be working directly from the Intelligent Business book.
english for advancedbusinesslevels
https://language-and-skills.com/home/
Language & Skills: Business English for advanced learners in Dusseldorf
english for advanced learnerslanguage skillsbusinessdusseldorf
https://elllo.org/video/C1ADV/
One Minute English for Advanced Learners - Level C1
One Minute English - Watch one-minute videos for Advanced Learners of English. All videos come with a script, quiz and vocabulary lesson!
english for advanced learnersone minutelevel
https://bilakniha.cvut.cz/en/predmet23066905.html
English for Advanced Students P3
english for advancedstudents