Excercise 7: Object in Different Positions in the Frame

The subject needs to be smaller for this excercise but I attempted it with these:

1 First shot, not attempting to compose.

2 Centre of frame

 

3 This should have been the 'little way off centre' but because the subject is so large, it actually goes to the edge of the frame!

 

4 Edge of frame

I prefer the two at the edge of the frame but I need to redo this exercise with a smaller subject and a larger more even background.  I think I actually prefer photo number 3  as I think the lines of the road are contributing to my liking of the picture.