Business

https://www.ego4u.com/en/business-english/communication

B1 Business Preliminary
https://www.cambridgeenglish.org/exams-and-tests/business-preliminary/

B2 Business Vantage
https://www.cambridgeenglish.org/exams-and-tests/business-vantage/

C1 Business Higher
https://www.cambridgeenglish.org/exams-and-tests/business-higher/

Resources for teaching Business English as well as specialized resources dedicated to the world of work
https://www.onestopenglish.com/adults/business-and-esp