Form 4 There is / there are

https://www.youtube.com/watch?time_continue=3&v=mvOPWQo2M4A
https://agendaweb.org/exercises/grammar/there-is-there-are/index.html
https://www.englisch-hilfen.de/en/exercises/various/there_is_there_are.htm
https://www.englisch-hilfen.de/en/exercises/various/there_is_there_are2.htm