Вставить wherever whatever whoever whichever whenever however they go their dog follows them hard be tries he can't have a 5 in history 3 you can sit you like 4 don't open the knocks at it

1 Wherever(whenever) they go their dog follows them. 
2 However hard he tries he can't have a "5" in History.
3 You can sit wherever you like.
4 Don't open the door whoever knocks at it.