Okay, so these are all right.
For number one, I would square up your shooting angle
just like MulletCat suggested to me (scroll down). Squaring up your photos makes all the difference. Secondly, this photo just isn't that good. It's a generic building front- the only interesting thing about it is the bike. I would make the bike the focus of the shot, not the building, and I would play with angles. Overall, I just don't see this one as worth posting- it's useful for historical documentation, but not much more beyond that.
Number two is my favorite of this set. Though the lines on the fence make it look at bit busy, you can make that work. It actually bears a close resemblance to
zebra camouflage from WWII. The black and white look works pretty well for this one- this photo wouldn't feel out of place in the slightest if you claimed it was taken in the 1940s, and that's pretty cool.
Number three is all right- I personally would get along the wall to make the graffiti extend into the distance, kind of like the photo below. Some translation would make it more interesting- knowing what it says and the possible story behind it makes it more interesting. Overall, not a bad photo- just unmemorable.
The columns fading into the darkness in number four are pretty cool- there's just too much static. A little static is all right, but it comes across as grainy. I suspect you added static with photo editing software. If not, try to use a tripod to shoot in night mode to reduce static.
The static actually works in number five, but the columns are too blurry. Some photo editing software (such as paint.net) might help you experiment to find a balance between blurry and static.
Overall, this is a decent set. There's room to improve, but nobody starts out perfect. Believe me, some of the shots I personally considered "good" when I first started out would get dumped in the trash now. You have a good eye for when black and white enhances the photo, and I can tell you played with lights at least a little in number five- to a pretty good effect.
Keep trying, and never settle for perfection. This is a good start, and a solid springboard to propel your photography skill to new heights.