Problem: How does the sentence end?

Brett talked Eric into learning Spanish, it was obvious to the teacher that 
Answer: Eric was a slower learner.

Problem: How does the sentence end?

The hand written letters were special, but the cards were not, because the 
Answer: letters were personal.

Problem: How does the sentence end?

Matthew finally convinced Randy to go to the zoo but 
Answer: Randy really disliked animals and didn't want to take photos.

Problem: How does the sentence end?

The vacuum that I bought was a lot better than the simple broom, because the 
Answer:
broom was weak.