Form 5a. Prepositions of place

For practicing:
http://www.perfect-english-grammar.com/prepositions-of-place-exercise-1.html;
https://www.ego4u.com/en/cram-up/grammar/prepositions/exercises?07;
https://www.ecenglish.com/learnenglish/lessons/in-on-at-prepositions-place;
http://learnenglishkids.britishcouncil.org/en/grammar-practice/prepositions-place;
https://www.esolcourses.com/content/exercises/grammar/prepositions/prepositions-of-place/prepositions-of-place-quiz.html.