[Q]: How does the sentence end?

Josie had a terrible cold, so she left her bedroom and went to the kitchen, because the

[A]: kitchen was warmer.

[Q]: How does the sentence end?

The school stood for longer than the factory had because the

[A]: school was being taken care of.

[Q]: How does the sentence end?

Jenny found that using peroxide instead of toothpaste on her teeth gave her a better smile, because with

[A]:
peroxide her teeth were whiter.