Problem: How does the sentence end?

So 
Answer: Samantha was quite worried about the exam that's coming because Samantha forgot to study and Monica didn't.

Problem: How does the sentence end?

Maria wanted a pet gerbil while Betty insisted on a cat. 
Answer: Betty had never particularly liked rodents.

Problem: How does the sentence end?

Sarah was trying to teach Erin how to say hello properly instead of saying bonjour. 
Answer: Erin  spoke French better.

Problem: How does the sentence end?

Kayla had more frequent migraines than Felicia, so 
Answer:
Kayla had to take migraine medication frequently.