http://www.englishlessonsbrighton.co.uk/future-tenses-exercise/
https://www.englisch-hilfen.de/en/exercises/tenses/future.htm
https://www.englisch-hilfen.de/en/exercises/tenses/future2.htm
https://www.ego4u.com/en/cram-up/grammar/future-mix/exercises
http://esl.fis.edu/grammar/multi/allFuture.htm
https://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/fut1.htm
https://www.englishgrammar.org/future-tenses-exercise/
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php
https://www.english-4u.de/en/tenses-exercises/future.htm
https://www.perfect-english-grammar.com/future-tenses-form-mixed-exercise-1.html
https://elt.oup.com/student/solutions/int/grammar/grammar_05_022e?cc=ar&selLanguage=en
https://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-5110.php