Find the correct grammatical structure of the given sentence: I was doing some housework when I found our old family aibum. a) Past Simple + Past Continuous; 6) Past Continuous +Past Continuous; B) Past Simple + Past Simple; r) Past Continuous + Past Simple. ПОЖАЛУЙСТА ПОМОГИТЕ!!!!!

I was doing some housework when I found our old family aibum.

r) Past Continuous + Past Simple.