Problem: How does the sentence end?

A very single Christopher wanted Matthew's boyfriend, so
Answer: Matthew kept them apart by spreading rumors about them.

Problem: How does the sentence end?

Carrie had to bring their pet to the vet more often than Erin had to bring theirs because the pet of
Answer: Carrie suffered from more illnesses.

Problem: How does the sentence end?

I believe Jessica is more trust worthy than Maria, from what I see
Answer: Jessica takes their duty seriously.

Problem: How does the sentence end?

Tanya was excited to be on the quiz show while Jennifer was not because
Answer:
Tanya was very smart.