The listening answer key for Book 2 is deceptively simple (just letters: A, B, C, D). However, the revised 2021 format listening includes:
Because this is a copyrighted textbook (typically published by or similar ELT publishers like Grivas or Global ELT ), the full answer key cannot be reproduced verbatim here. However, I can provide the official listening transcripts (which contain the answers) and a marking guide to help you grade your tests. The listening answer key for Book 2 is