[Q]: How does the sentence end?

Emily lent Rebecca her new vampire book because

[A]: Rebecca hadn't bought the book yet and wanted to keep up with the series.

[Q]: How does the sentence end?

Joseph helped Ryan get their range of motion back after their injury, because

[A]: Joseph was more flexible.

[Q]: How does the sentence end?

Cynthia was given a medical diagnosis by Maria at an appointment.

[A]:
Cynthia was the patient.