Hi Shirley,
Graceful - A many horned shoe there I feel, and a little on the soft side perhaps?
Fruit - Good action shot. Focus is good and he stands out from the background

Vehicle - Is this a crop? It feels like you're at the limit of what your camera / lens combination can be pushed to. I suspect that if you could have gotten closer, there would be more definition.
Ah, just seen your comment to Dave, perhaps a job for the zoom controls that you insert into trainers / boots.
Piece - Are you sure it's not pre-historic celtic? I find it interesting that it's obviously in focus (judging from the texture), yet appears blurred due to the low quality of the artwork.
Contrast - Nice. I like the composure, background and sharpness. I think the instagram crop works well.