Problem: How does the sentence end?

The bulletin board was decorated by Jeffrey instead of Hunter because
Answer: Jeffrey offered to do it.

Problem: How does the sentence end?

The behavior of Adam was a lot worse than Steven because
Answer: Adam had a very bad childhood.

Problem: How does the sentence end?

The cake he made for his sister's birthday party wouldn't fit on the plate because the
Answer: plate was too small.

Problem: How does the sentence end?

Samuel wanted to buy Ryan a computer as a gift but wasn't sure what they wanted, so
Answer:
Samuel had to ask for advice.