[Q]: How does the sentence end?

It was easy for Felicia but not Laura to win the race because

[A]: Felicia ran very quickly.

[Q]: How does the sentence end?

Rachel wanted to have a barbecue and asked Christine to borrow their grill because

[A]: Rachel didn't have one.

[Q]: How does the sentence end?

At the pet store Joel bought a parrot but Brian didn't because

[A]:
Brian thinks parrots are scary.