Question:
Sarah washed their countertops frequently to keep them clean but Monica's were always a mess because

Answer:
Continue the sentence -- Monica was very careless.

Question:
The man chose concrete for his driveway rather than gravel although the

Answer:
Continue the sentence -- concrete was expensive.

Question:
The protesters made their signs with markers, not crayons, at the rally. The

Answer:
Continue the sentence -- crayons are difficult to see.

Question:
Dennis wanted Joseph to have strong teeth, so they made sure

Answer:
Continue the sentence -- Joseph knew where to get calcium.