http://usefulenglish.ru/grammar/
http://usefulenglish.ru/miscellany/
Some tips on confusable items
http://www.aprendeinglesenleganes.com/resources/ADVANCED%20GRAMMAR%20%20-%20CAE%20-%20CPE.pdf
http://docenti.unimc.it/sharifah.alatas/teaching/2019/21607/files/course-materials-i-semestre/advanced%20language%20practice.pdf
https://sites.google.com/site/gloriasc1201819/emphasis
https://sites.google.com/site/gloriasc1201819/the-journey-of-a-lifetime/adverb-adjective-collocations
https://sites.google.com/site/gloriasc1201819/the-journey-of-a-lifetime/deductions-in-the-past
