The document is a student's book for a business English course. It contains various units covering topics like working across cultures, informal meetings, language at work, and introducing yourself to a group. Each unit provides exercises, case studies, and language practice related to the topic. For example, the unit on informal meetings has exercises where students listen to a conversation between two colleagues reporting back from a business trip, and complete notes and questions about the content. The units aim to develop students' business communication skills and language for discussing common business situations.