https://www.englishexercises.org/makeagame/viewgame.asp?id=1615

https://www.perfect-english-grammar.com/support-files/will_or_be_going_to.pdf

http://www.grammar.cl/Notes/Future_Will.htm

http://www.grammar.cl/Notes/Future_Will_vs_Going.htm

http://digitalcampus.free.fr/Level2/Unit22/SubUnit222/ComplSentQCM.jqz.htm

https://www.really-learn-english.com/support-files/simple-future-story-4.pdf

https://www.montsemorales.com/gramatica/Willorbegoing4-5.htm

https://elt.oup.com/student/solutions/preint/grammar/grammar_06_012e?cc=co&selLanguage=en

https://www.proprofs.com/quiz-school/story.php?title=must-have-to-should

https://www.eslfast.com/robot/topics/social/social01.htm

https://english.lingolia.com/es/gramatica/tiempos-verbales/future-i-simple-going-to/ejercicios

https://learnenglish.britishcouncil.org/en/english-grammar/ability-permission-requests-and-advice

http://www.englishexercises.org/makeagame/viewgame.asp?id=1792