★★★★☆ (4/5) Deducted one star for monotony. Added two stars for results.
Mastering English: A Guide to English Grammar in Use Intermediate MP3 Resources
: Since it is published by Cambridge University Press, the quality of the recordings is consistently high [1]. Cons :
: One page of theory, one page of practice. Practicality : Focuses on grammar people actually use. Versatility : Use it as a reference or a full course.