Problem: How does the sentence end?

Cold sores are a problem for Kayla, but Erin never gets them. 
Answer: Kayla has contracted the herpes virus.

Problem: How does the sentence end?

The arm was injected with medicine, but not the leg, because the 
Answer: arm had an infection.

Problem: How does the sentence end?

The stick wasn't able to reach across the hallway because the 
Answer: stick was too short.

Problem: How does the sentence end?

No one dared to criticize Maria 's performance, while they felt free to demonize Katrina, as 
Answer:
Maria was so intimidating to them.