[Q]: How does the sentence end?

Natalie got much bigger than Betty after

[A]: Natalie spent a year in the gym doing strength training.

[Q]: How does the sentence end?

Christine was very good at giving a massage but Megan was not.

[A]: Megan made little money at the massage parlor.

[Q]: How does the sentence end?

Angela was nocturnal while Erin was diurnal so

[A]:
Angela preferred to stay out late at night.