[Q]: How does the sentence end?

Mary was home schooled, unlike Betty, so 
OPTIONS:
- Mary was unfamiliar with the layout of the school building.
- Betty was unfamiliar with the layout of the school building.

[A]: Mary was unfamiliar with the layout of the school building.
QUES: Continue writing.

In the grocery store today, Derrick tried to pass off a fake coupon, but William knew 

OPTIONS:
- Derrick was trying to scam him.
- William was trying to scam him.
+++++++++
ANS: Derrick was trying to scam him.
Problem: How does the sentence end?

Daphne got herself a cloak and a bodysuit for her Raven costume, and she thought the 
OPTIONS:
- cloak made her look mysterious.
- bodysuit made her look mysterious.
Answer: cloak made her look mysterious.
sentence: Erin offered to buy the art Jennifer created because  OPTIONS:
- Erin was very impressed by it.
- Jennifer was very impressed by it.
complete: Erin was very impressed by it.
Steven proclaimed to Eric that the Bible was a book of fiction.  
OPTIONS:
- Steven was appalled.
- Eric was appalled.
Eric was appalled.
Problem: Continue the following story.

The doctor replaced the dirty carpet with stained concrete over the winter, the 
OPTIONS:
- carpet was old.
- concrete was old.
Here's how I want to continue it:
carpet was old.