That section is on pg. 152.
Does anyone know exactly what this exercise is asking for? I’m not entirely sure. Am I suppose to fill in principal clause with each subjunctive verb in the brackets and then translate? D’Ooge really should have provided some instruction for this otherwise never before seen exercise drill in his book. Could I get someone’s confirmation, or opinion, if that’s what it’s asking for (you know I’m talking to you bedwere)?
Gratias tibi (vel vobis) ago.
I think you just need to translate it by producing an analogous pattern in English. By the way, if you could add the link to the page on the archive.org scan yourself, it would be helpful to all those who don’t have the book.
I’m not sure how to do that. But the book is available in the front page of textkit. It’s the first book in the Latin section below the Greek books. The answer key is the sixth in the list.
I know where the book is. In truth, it would make my life easier: if you do the effort to provide the link to the page, I don’t have to do the effort to search for the page. 
Anyway, let me translate the first exercise for you, You do the rest.
https://www.textkit.com/learn/ID/108/author_id/13/
This is the best I could do, bedwere. I really don’t know how to link pages to that website. I’m not too good with computers. I just finished the exercises by the way. I’ll post them tomorrow. You’ve been a great help on my self-study of Latin.
Gratias tibi ago.
No problem. Just take care of the exercises.