Problem: How does the sentence end?

Many people thought Eric looked and acted younger than Steven, although 
Answer: Steven was actually younger.

Problem: How does the sentence end?

Playing Scrabble is fun for Joel but not Hunter because 
Answer: Joel knows a lot of difficult words.

Problem: How does the sentence end?

I can't remember if I packed my bag with the bowling ball or the soccer ball. The bag was heavy so it must have the 
Answer: bowling ball in it.

Problem: How does the sentence end?

Jessica tried to braid the child's hair but Tanya had to do it. 
Answer:
Jessica had never understood how to do it.