It was at 6 am that i arrived

It was at 6 am that i arrived it was at 6 that we arrived at the school改成it was school 的 It was at 11olock that i arrived home.为什么用that 不用when it was not until he arrived at the stadium (that)he was told When I arrived at the university,I was told that I would hav 1.Was it at ten last night _____ you arrived home?A.that B.w was it midnight -----you arrived home by taxi?A.that B.at wh was it midnight -----you arrived home by taxi? A. that B. at It was only three weeks later that we arrived at the foot of It was at 5 o'clock ___he arrived.横线上填That还是填When? it was really the decisions I made once I arrived that made It was getting to rain as soon as I arrived at the station是填