PREPOSITIONS: IN, ON, AT

Prepositions of place

http://www.1-language.com/englishcourse/unit6_grammar.htm 

http://www.1-language.com/englishcourse/unit6_grammar_exs.htm

https://test-english.com/grammar-points/a1/at-in-on-prepositions-of-place/

https://test-english.com/grammar-points/a1/at-in-on-prepositions-of-place/2/

https://learnenglish.britishcouncil.org/grammar/a1-a2-grammar/prepositions-place