Problem: How does the sentence end?

If you're learning a foreign language, I recommend the tapes over the books since the 
OPTIONS:
- tapes are less helpful.
- books are less helpful.
Answer: books are less helpful.
sentence: Rachel was better at asking and answering questions than Laura, so  OPTIONS:
- Rachel lost the debate.
- Laura lost the debate.
complete: Laura lost the debate.
Mary has taken a karate class, but Rachel never has, so 
OPTIONS:
- Mary is the one who is better at defending himself.
- Rachel is the one who is better at defending himself.
Mary is the one who is better at defending himself.
Input: Continue writing.

The treasury workers took the gold bars off of the trolley and stacked them in the safe until the 
OPTIONS:
- safe was empty.
- trolley was empty.

Continued: trolley was empty.
Story needs to be completed:
Jessica wanted to fix a broken nail while Elena wanted to fix a broken friendship. 
OPTIONS:
- Jessica fixed the broken nail.
- Elena fixed the broken nail.

My choice:
Jessica fixed the broken nail.
Problem: How does the sentence end?

Ben wanted a faster ride to India. His mom booked both a train and plane ride. However, he returned the 
OPTIONS:
- train because it was inefficient.
- plane ride because it was inefficient.
Answer:
train because it was inefficient.