Problem: Brian lost his foot race against Justin because 
OPTIONS:
- Brian ran much faster than his opponent did.
- Justin ran much faster than his opponent did.

My choice: Justin ran much faster than his opponent did.
[Q]: How does the sentence end?

The orphaned kids performed worse than the raised kids because the 
OPTIONS:
- orphaned ones were lost.
- raised ones were lost.

[A]: orphaned ones were lost.
QUES: Continue writing.

Eric was easier to amuse than Justin because 

OPTIONS:
- Eric had a bad sense of humor.
- Justin had a bad sense of humor.
+++++++++
ANS: Justin had a bad sense of humor.
Problem: How does the sentence end?

Lisa used brush to clean her dog's fur instead of the comb because the 
OPTIONS:
- brush was old.
- comb was old.
Answer: comb was old.
sentence: Brett decided to paint a lot of things for Joel, because  OPTIONS:
- Brett needed the money.
- Joel needed the money.
complete: Brett needed the money.
Input: Continue writing.

Justin decided to give his place to Steven in the mountain expedition because 
OPTIONS:
- Justin was too tired.
- Steven was too tired.

Continued:
Justin was too tired.