Story needs to be completed:
Brett didn't understand how Nelson was able to train his bulldog so quickly, but 
OPTIONS:
- Brett didn't understand how many hours of work it had actually taken.
- Nelson didn't understand how many hours of work it had actually taken.

My choice:
Brett didn't understand how many hours of work it had actually taken.
Problem: Continue the following story.

Jessica spent less time studying for school than Samantha so 
OPTIONS:
- Jessica had better grades in class.
- Samantha had better grades in class.
Here's how I want to continue it: Samantha had better grades in class.
Problem: Angela is choosing a skin toner and needs an advice from Monica, because 
OPTIONS:
- Angela has a lot of experience.
- Monica has a lot of experience.

My choice: Monica has a lot of experience.
[Q]: How does the sentence end?

Patricia was a witness to Megan 's crime. 
OPTIONS:
- Patricia went into hiding to avoid being prosecuted.
- Megan went into hiding to avoid being prosecuted.

[A]: Megan went into hiding to avoid being prosecuted.
QUES: Continue writing.

The dog ran up to Craig but not Randy because 

OPTIONS:
- Craig had a treat for the animal.
- Randy had a treat for the animal.
+++++++++
ANS: Craig had a treat for the animal.
QUES: Continue writing.

Grooming dogs in the summer suited Christine but not Angela because 

OPTIONS:
- Christine did not want to be a veterinarian or work with animals.
- Angela did not want to be a veterinarian or work with animals.
+++++++++
ANS:
Angela did not want to be a veterinarian or work with animals.