Problem: How does the sentence end?

Dennis stood up in the subway car and offered hi seat to Nelson because 
OPTIONS:
- Dennis was standing.
- Nelson was standing.
Answer: Nelson was standing.

Problem: How does the sentence end?

Catherine liked to draw hearts more than she liked to draw cars because the 
OPTIONS:
- hearts are simple.
- cars are simple.
Answer: hearts are simple.

Problem: How does the sentence end?

He knew that the sun was closer to earth than the other star, because the 
OPTIONS:
- sun was brighter.
- star was brighter.
Answer: sun was brighter.

Problem: How does the sentence end?

While Hunter had poor handwriting, Joseph had neat handwriting, so it was difficult to read the writing of 
OPTIONS:
- Hunter sometimes.
- Joseph sometimes.
Answer:
Hunter sometimes.