[Q]: How does the sentence end?

The lady's vacuum worked a lot better on the carpet than the broom, because the 
OPTIONS:
- vacuum was useless.
- broom was useless.

[A]: broom was useless.
QUES: Continue writing.

Justin asked Leslie to clean the house because visitors were coming and 

OPTIONS:
- Justin had to work that day.
- Leslie had to work that day.
+++++++++
ANS: Justin had to work that day.
Problem: How does the sentence end?

The draining discussion was followed by a lively lecture.  The 
OPTIONS:
- discussion was just so interesting.
- lecture was just so interesting.
Answer: lecture was just so interesting.
sentence: In December Steven thought they were going to freeze but Derrick was overheating because  OPTIONS:
- Steven lived in a cold country.
- Derrick lived in a cold country.
complete: Steven lived in a cold country.
Katrina's challenges at school included math and science, while Kayla's were reading and literature.  
OPTIONS:
- Katrina was definitely better at literary subjects.
- Kayla was definitely better at literary subjects.
Kayla was definitely better at literary subjects.
Problem: Continue the following story.

Samantha gave a special ice cream treat to Betty, so 
OPTIONS:
- Samantha walked around with an empty hand.
- Betty walked around with an empty hand.
Here's how I want to continue it:
Samantha walked around with an empty hand.