[Q]: How does the sentence end?

The boy left his books in his desk instead of putting them in his backpack because there was less space in the 
OPTIONS:
- backpack .
- desk .

[A]: backpack .


[Q]: How does the sentence end?

Kyle thought the temperature was too warm while William thought it was too cold, so 
OPTIONS:
- Kyle turned the heat up.
- William turned the heat up.

[A]: William turned the heat up.


[Q]: How does the sentence end?

Katrina could feel her period coming. So when she snapped at Angela, 
OPTIONS:
- Katrina thought it was probably the hormones.
- Angela thought it was probably the hormones.

[A]:
Katrina thought it was probably the hormones.