The last shot is the best. In each of the other shots, there are too many distracting elements and the subject is not clear.
For example, as noob873 stated, in #2, the light post is distracting. It looks as though it's a nature shot of the trees until you see the light post.
#3 has no clear subject - I'm guessing the subject is the bushes, and they are somewhat interesting, but there's power lines crisscrossing, and buildings in the background - it's too cluttered.
Keep at it though, you'll start to "see" your subjects better and find the angles to eliminate the clutter with practice.