Listening

http://www.listeningpractice.org/start.php?lang=eng

Reading

http://www.testyourenglish.net/english-online/menu/cloze-tests.html

http://www.esl-lounge.com/student/reading-advanced.php

https://www.usingenglish.com/comprehension/advanced.html

Writing

http://www.academicenglishcafe.com/writing-quizzes.html

Grammar

http://a4esl.org/q/h/grammar.html

Typing

https://www.typing.com/student

https://keybr.com/​