I was six years old when I had a narrow escape without even a scratch. Our one-storey house collapsed all of a sudden at three (o'clock) in the morning / at 3 a.m.
Can some words be substituted for some good words?-- Mostly, I want you to be more careful. Why should we bother to help when you post things like 'yrs' and 'strorey'? Proofread before you post.