Problem: How does the sentence end?

Mary left the envelopes in the basket and focused on addressing the postcards, because the 
OPTIONS:
- envelopes were nonurgent.
- postcards were nonurgent.
Answer: envelopes were nonurgent.

Problem: How does the sentence end?

Nick has a badly dislocated shoulder and asks for Robert's help, because 
OPTIONS:
- Nick is doctor.
- Robert is doctor.
Answer: Robert is doctor.

Problem: How does the sentence end?

The worker moved the cardboard from the truck to the storeroom until the 
OPTIONS:
- truck was empty.
- storeroom was empty.
Answer: truck was empty.

Problem: How does the sentence end?

Erin was more afraid of the Leopard Gecko crawling around than Rebecca because 
OPTIONS:
- Erin liked reptiles.
- Rebecca liked reptiles.
Answer:
Rebecca liked reptiles.