Lines: I think you start out okay and every line is going from the same point aka no stray in the beginning but then you start to be to fast and the lines have a lot of straying. I would recommend you to take a little more time and also to fill the pages a little more. That way you will get more practice.

When you were doing ghosted lines you were on point but i the lines look like they were drawn in a hurry so i recommend you to be confident like you are but a little slower.

Ellipses are looking okay but i would also recommend going a little slower.

Also if you are drawing big ellipses try to be very exact at drawing them so they touch the borders that they should so it looks good.

The boxes in perspective exercise is looking very neat and tidy well done:)

The free hand boxes in one point perspective my only suggestion is to not make points or corners so visible just gost line and maybe a little almost invisible dot so you can fix your lines maybe in the process of drawing.

When you shaded the round boxes ylu just went over everything with the texture pointed in the same direction that makes the drawing not so believable. And also the boxes in the corners are not turned enough. I recommend retrying this exercise.

I think you did the organic boxes very well better then me so i have no complaints well done:)

Overall very nicely done!

Good luck and have fun!

David_Green_Bean