Problem: Rachel could act as though they cared about something they did not whereas Mary could not because 
OPTIONS:
- Rachel was very duplicitous.
- Mary was very duplicitous.

My choice: Rachel was very duplicitous.
[Q]: How does the sentence end?

Brett did the upholstery work on his new furniture for his friend Nick.  
OPTIONS:
- Brett was talented.
- Nick was talented.

[A]: Brett was talented.
QUES: Continue writing.

John regretted leaving his job working with tires to start working with engines, since the 

OPTIONS:
- engines generated insignificant cash flow.
- tires generated insignificant cash flow.
+++++++++
ANS: engines generated insignificant cash flow.
Problem: How does the sentence end?

Joel made a chart to make sure Matthew did chores, but 
OPTIONS:
- Joel forgot to add vacuuming.
- Matthew forgot to add vacuuming.
Answer: Joel forgot to add vacuuming.
sentence: She didn't want to calculate the cost of the car instead of the scooter, since the  OPTIONS:
- car was cheap.
- scooter was cheap.
complete: scooter was cheap.
Input: Continue writing.

For better muscle tone, discard the machines and use barbells, as the 
OPTIONS:
- machines will give you an ineffective workout for this.
- barbells will give you an ineffective workout for this.

Continued:
machines will give you an ineffective workout for this.