Problem: How does the sentence end?

Since the baseball broke Mary's windshield but missed Lindsey's car altogether,
Answer: Lindsey could not believe their amazing luck.

Problem: How does the sentence end?

The smile of Matthew is duller than Craig's is, so
Answer: Matthew brushes his teeth less often.

Problem: How does the sentence end?

Elena can prepare the dinner for us but don't ask Betty as
Answer: Betty is an mediocre cook.

Problem: How does the sentence end?

Samantha used a brush on their hair after a shower but Christine just toweled their hair.
Answer:
Christine had tangled gnarly hair.