Problem: How does the sentence end?

Robert attempted to help Jason with their anxiety when
Answer: Robert showed them the facts surrounding anxiety medications.

Problem: How does the sentence end?

Adam went to school today and William did not because
Answer: William was feeling quite sick.

Problem: How does the sentence end?

In the garden, the tomatoes grew faster than the potatoes due to the
Answer: potatoes having impotent dirt.

Problem: How does the sentence end?

In choir, Laura is taking voice lessons from Erin, so it's likely
Answer:
Laura is the student.