1) b:i was waiting .. was buying
2) a: were you talking
b:was telling
3) a:were his parents living
b:were living .. was working
4) a:were you watching
b:was reading
5) a:were you having
b:were talking
6)a:were you playing
b:was not playing .. was doing
7) a:were they wearing
b:weren't wearing .. were wearing