[Q]: How does the sentence end?

It took longer to paint the living room than the kitchen because the

[A]: living room was bigger.

[Q]: How does the sentence end?

Megan cared for many more patients than Katrina because

[A]: Megan worked in a bigger hospital.

[Q]: How does the sentence end?

Amy had to change their car coolant but not Christine because the car of

[A]:
Christine was cool.