@talatahehe, I'm really not sure anymore, I think it was because "as for bla, bla and bla, history was" works, whereas "as for bla, bla and bla, they saw" doesn't work.
again, does anybody here remember the answer like"reveal their aversion to music" in the blues brother? the other choice was like"enforcing 2 diff approaches" or sth....
@ egyptianstudient
the first one is Didnt leave since the sentence goes like this 'people didnt leave... until ....'
have left, if put, would be awkward and does not fit with tense.
