[Q]: How does the sentence end?

Rachel handed Carrie twenty dollars so at the cash register

[A]: Carrie could sell the collar for the puppy.

[Q]: How does the sentence end?

George did the concrete driveway before doing a concrete foundation because doing a

[A]: driveway was more elementary.

[Q]: How does the sentence end?

College studying for exams suits Nick, but isn't easy for Nelson because

[A]:
Nelson is very lazy.