In the ghosted planes I see parts that look like there was some corrections done when the line didn't end at the intended place, embrace those misses and move on, don't try to correct with extra lines.

In the ellipses I see many that look like they weren't drawn through completely, don't be afraid to go a third time if necessary to ensure you've gotten through the whole form.

In the funnels it appears that some of these didn't have an ellipse in the actual center of the funnel, make sure you're reading through the material carefully to best understand the instructions. They are tightly packed and looking good otherwise.

The boxes look to be in the right direction as far as angle and foreshortening, but remember to take your time with each line as it's own unit of work, ghost through the line and draw with your shoulder. Some look like they have some arc that might be coming from the elbow or wobble that comes from the wrist correcting itself.