Test yourself
https://www.cambridgeenglish.org/test-your-english/for-schools/
Reading, listening, writing tasks
https://test-english.com/reading/b1/
Countable and uncountable nouns
http://www.english-room.com/grammar/countable_uncountable.htm
http://a4esl.org/q/j/km/mc-noncount.html
http://www.carmenlu.com/first/grammar/countable1_1.htm
https://www.myenglishpages.com/english/grammar-exercise-countable-uncountable-nouns.php
Reading a book
https://docs.google.com/document/d/1H8CDhTx11IYgl_Vh0vYOHQX0-UyCVDG830ZXAj0ohjo/edit?usp=sharing