Problem: How does the sentence end?

James found out the water floating on the pot after he watered it with a can. He should have known the 
Answer: water is too much.

Problem: How does the sentence end?

When the person started choking, Betty but not Katrina performed the Heimlich maneuver because 
Answer: Betty had extensive knowledge of first aid.

Problem: How does the sentence end?

When he inspected his football protective gear for the coming season, he decided he needed a new mouthguard but could still use the helmet. The 
Answer: mouthguard was broken.

Problem: How does the sentence end?

At the doctor's office, Ian asked Nelson to open their mouth and say "ahh"; 
Answer:
Nelson was afraid it was laryngitis.