The key follows the exact unit and exercise numbering of the main textbook. Each unit covers a core grammar area typical for CEFR A2–B1 level (pre-intermediate to intermediate). For every exercise, the key provides:
English grammar tests: How to Answer 5 Question Types #EnglishHelp success in grammar 3 answer key
After a grammar drill, have students swap books and use the answer key to correct each other. Then discuss the top 3 most missed questions as a class. The key follows the exact unit and exercise