[JustJohn]

This isn’t a comment on your reads so much as a comment on sound quality: I know this is “just” homework, but the acoustics sound a bit like you’re recording in a tin can in the next room. If you’re going to be recording yourself for work, you will want a bit more “present” sound quality.

As far as your reads: the Purina ad is very good. Nice contrast on “good news”/”great news”. In my opinion, “your canary will thank you for it” could use a little more pitch variation.

The Carnation ad is also very good; very professional sounding, with natural-sounding expressiveness. At the tag line, “because today could change everything,” it sounds a bit like you hit the bottom of your vocal range, so the word “everything” is on a fry that sounds almost whispered. You might want that to come out a little more, so as to be the same volume level as the rest of your (quite good) read.