when i arrived at his office ,i()that he()out

when i arrived at his office ,i()that he()out when I arrived at his office,he___on the phone when I got to this office,I ( ) that he ( ) out. 关於英语的过去进行时说明一句例如:When I arrived at his office,he was talking Hardly() i arrived at the office when the phone he asked me when i arrived at school .when i arrived at scho he was already/just in the office when i arrived选择already/ju When I arrived at the university,I was told that I would hav He pushed me out the room suddenly I arrived at home at abou I went to his office only___him out. he was simply out when I knocked on his door It was at 11olock that i arrived home.为什么用that 不用when