Taking an overall look at your submission, I'd say you did a good job. Your stand alone cylinders and cylinders in boxes for the most part follows the method for drawing cylinders very well.

The only thing of note I feel I should mention are the numbers 133, 135, and 134 on this page https://i.imgur.com/3ZyEPog.jpeg

As a cylinder goes further away, the ends will get closer, and in these examples you drew the shaded part in the opposite way.

Taking #133 as an example, without changing the lines at all, by implying the other end is facing us, the problem is fixed, although I am just showing this as an example. If we intend to draw this cylinder in a position where the right face is the face we can see, the lines should converge, even if ever so slightly to show that. I noticed this here and there in your submission, but as you went on your cylinders had this problem less and less but I figured I should mention it. With #133 that divergence is extremely tiny, but that tiny divergence still makes it incorrect. When a cylinder is in a shallow perspective like #133, just take extra care to make sure the lines do not diverge. Convergence, even just a little bit is correct.

incorrect - https://i.imgur.com/cAqOqBi.png

Correct - https://i.imgur.com/e8GcWtC.png

another good example is this page here, where #89 is correct, while #91 is incorrect in the same way as #133, except here it is much more obvious. The way #91 is drawn here, implies that the cylinder widens the further back it goes, like a cone.

https://i.imgur.com/lNx1oeA.jpeg

Other than that small nitpick, I'd say you adhered to the principles rather well. You made sure to make the farther end a little bit of a wider angle, and as you progressed, your cylinders became better and better, aside from that small nitpick. Just keep that convergence over divergence tidbit in mind going forward.