Problem: How does the sentence end?

Leslie got a much higher grade on the exam than Dennis because
Answer: Dennis spent a short time studying.

Problem: How does the sentence end?

Tanya travels a lot, while Emily doesn't like to leave their hometown.
Answer: Emily is more timid.

Problem: How does the sentence end?

Adam generally applies more makeup than Kevin does because
Answer: Kevin cares less about their appearance.

Problem: How does the sentence end?

We could not make the milkshake on the counter and had to move to the table, since the
Answer:
counter was so cluttered.