I called you half an hour ago,（）you were not at home.( )you out?

I called you half an hour ago,（）you were not at home.( )you out?
I called you half an hour ago,（）you were not at home.( )you out?

I called you half an hour ago,（）you were not at home.( )you out?
I called you half an hour ago,（but）you were not at home.(Were)you out?

but were