Quantifiers!

Practice how and when to use: 

much/many

https://www.englishgrammar.org/many-or-much/

a little/ a few  

https://www.grammarbank.com/a-little-or-a-few-exercise-dd1.html

some/any

https://www.perfect-english-grammar.com/some-and-any-exercise-2.html

few, a few, little, a little

https://www.englishgrammar.org/few-a-few-little-a-little/

https://www.perfect-english-grammar.com/a-little-a-few-exercise-1.html

https://www.focus.olsztyn.pl/en-few-a-few-little-a-little-exercises.html  

https://www.eltbase.com/quiz/033_01.htm

https://www.esl-lounge.com/student/grammar/3g37-few-a-few.php 

https://www.grammarbank.com/quantifiers-fill-in-exercise-dd1.html

https://www.grammarbank.com/quantifiers-fill-in-exercise-dd2.html