The 3rd Edition, tailored for the revised Cambridge B2 First exam, provides four complete practice tests. However, the magic lies in the "Guided Tour." It doesn’t just tell you the answer is "B"; it explains why "B" is right and why "A," "C," and "D" are wrong.
If you are a teacher, log into the Macmillan Professional section. Teachers who adopt the book can access a downloadable pack containing all audio files, answer keys, and transcripts.
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The audio files are recorded with the same as the real exam, ensuring you get used to the "exam conditions" timing. Tips for Using the Testbuilder Audio Effectively