[المتزن]

My brother : Lion Heart and brothers
Alsalam Alaikum
I agree with you that the answer is " had done " , but still I think that the word " regularly " is not in its appropriate place because as I said that the word " regularly " does not come but in the present simple .Therefore , they were supposed to change the word into another word or even to
. remove it

: Note

What I have said is my own openion . It is from my understanding and study of the language . It might be right or wrong .1

Thank you
your brother / Almutazin