1. https://test-english.com/grammar-points/b1/future-forms/

2. https://www.montsemorales.com/gramatica/Futurtenses.htm

3.https://www.e-grammar.org/future-simple-going-to-present-continuous-exercise-1/

4. https://wordwall.net/cs/resource/60375278/future

5. Pokročilá gramatika: https://www.umimeanglicky.cz/cviceni-future-tenses