Form 7b. Future forms

Simple Present is used to make statements about events at a time later than now, when the statements are based on present facts, and when these facts are something fixed like a time-table, schedule, calendar.
For practicing:
https://www.englisch-hilfen.de/en/exercises/tenses/going_to_future_mix.htm;
https://www.englisch-hilfen.de/en/exercises/tenses/will_future_mix.htm;
https://www.ego4u.com/en/cram-up/grammar/present-progressive/use/exercises?use02;
https://www.ego4u.com/en/cram-up/grammar/simple-present/use/exercises?04;
https://www.englisch-hilfen.de/en/exercises/tenses/will_going_to_future.htm;
https://www.ego4u.com/en/cram-up/grammar/future-mix/exercises;
http://www.english-4u.de/future_ex3.htm;
http://www.perfect-english-grammar.com/present-simple-future-simple-exercise-1.html.
For self-assessment:
https://www.englisch-hilfen.de/en/exercises/tenses/future.htm.