Definition: a single thing or a separate part of something larger Level: B1
这门课程的第一年分为四个单元。
The first year of the course is divided into four ___units.
课本的每个单元专注于一个不同的语法点。
Each ___unit of the course book focuses on a different grammar point.
我需要完成练习册中的下一个单元。
I need to complete the next ___unit in my workbook.
