[Q]: How does the sentence end?

Brett knew how to take care of a kitten better than Neil because

[A]: Neil was a dog person.

[Q]: How does the sentence end?

After Joel started dating Dennis's former girlfriend,

[A]: Joel tried to down play the new relationship.

[Q]: How does the sentence end?

Monica booked twice as many parties at her tubberware party than Amy because

[A]:
Amy offered a smaller cut in the sales as a gift.