Sách luyện thi PET: Gold B1 Preliminary New Edition with 2020 exam<b> NXB:</b> PEARSON<b> Năm xuất bản:</b> 2019 Link download: Gold B1 Preliminary Coursebook (pdf) Gold B1 Preliminary Teacher's Book (pdf) Gold B1 Preliminary Exam Maximiser with key (pdf) Gold B1 Preliminary Coursebook Audio (mp3) Gold B1 Preliminary Exam Maximiser Audio (mp3)