: Workbooks are usually divided into four main sections (Units). Identify which one your homework is in.

: Specifically designed for high school students, this site often includes translations of the texts and more detailed explanations for complex tasks.

: This is one of the most popular sites. It provides scanned or typed solutions for every unit (Unit 1 to Unit 4) of the workbook.

: Most sites allow you to click on the specific page number or exercise number directly from a grid.

: Vocabulary related to newspapers, TV, and the internet. Global Issues : Exercises on ecology and the environment.