I like #3 a real lot. Great shot and composition
#1 is also a good shot but the weeds on the left detract from the aloneness the composition would have if the floor was barren. The wall is a bit too bright and draws attention away from model and the bleakness. A softer diffused flash would have helped I think.
#2 the model isn't in focus perhaps stopping down the lense more would have kept the ghost like image and made it more appealing. Perhaps making it slightly tighter as well. The shot isn't squared off which detracts from it.
#4 I like the framing and composition but the model doesn't stand out enough for my taste. Her left hand looks too big because of its proximity to the cam and should have been kept in the shadows or by her side.
Take lots of good, well framed, correctly exposed shots at different heights, angles, and aperture settings, etc to get a few keepers.
All in all, great shots.