English Grammar Intermediate description

>>>Super Grammar Practice App!!! LESSONS AND TESTS!<<<
*** The app helps define your English GRAMMAR GAPS and
*** generates SPECIAL LIST of RECOMMENDED LESSONS.
*** The lessons are SHORT (it takes only 1 MINUTE! to read the theory), but IN DETAILS (Intermediate and Advanced level).
*** Tests contain the EXPLANATION (Why is the chosen variant wrong?) to EACH question.
*** SYSTEM APPROACH is applied to the information presentation.
>>>IMPROVE your English Grammar in a FAST and SMART way!<<<