2020版 Exam Booster KET with answer key 及音频

重磅资源：2020版 Exam Booster KET with answer key 及音频
介绍：
Exam Booster series is perfect for self-study and allows learners to practise each part of the exam three times.
Each book includes:
‘Exam facts’ that provide practical information about each task
‘Exam tips’ section offering advice on how to approach the exercises
‘Get it right’ boxes highlighting typical candidate errors and how to avoid them.