[Q]: How does the sentence end?

Aaron was always skipping leg day at the gym but Derrick never missed it.

[A]: Derrick had very muscular legs.

[Q]: How does the sentence end?

Hunter was very good at writing articles but Kyle was not.

[A]: Kyle didn't have their work published in a magazine.

[Q]: How does the sentence end?

Lindsey likes to barbecue their meat using charcoal but Maria prefers gas.

[A]:
Lindsey went to Lowes to buy more charcoal for their cook out.