Think these are good starting shots!
I'm not the best person to comment on urban shots, as i havn't really doen much urban shooting, but i'll try and help lol.
Shot 1
I think tecnically the shot is ok, think this is ok
Shot 2
With a tripod think this woudl be good, another think is that when you shoot pictures try lots of different angles of the same picture, i find this way you can delete the worst and keep the best.
For example the yellow box in the top right slightly distracts the eye
Shot 3
Again without the signpost in the image, i think this would be a really good shot! Instead of just looking and taking a picture, think for a second about the composition
Shot 4
I like this shot! Only thing i could suggest would be a slower shutter speed, to make the water smooth etc... But thats only beacuse i like water under slow shutter speeds
Shot 5
Think if you stood directly infront of the foundatin, to make all the edges square, and remove the person from the images, this woudl again be a good one, possiable again slow shutter speeds
Shot 6
The sky is too bland, if there was lots of colour then this type of shot would be ustified, but due to lack of colour/interest i'm not a fan
Shot 7
Again with a tripod and slow shutter speed i think you could have a really good shot hear
I hope this helps, as i said i'm prob not the best person to comment, but i hope this helps you. It's a very good start, so all i can say is keep shooting, you can only get better!!