Problem: How does the sentence end?

Normally teachers love giving children books to read instead of videos to watch because the
Answer: books are motivating.

Problem: How does the sentence end?

Christine's inner thighs are much more flabby than Lindsey's because
Answer: Lindsey is a body builder.

Problem: How does the sentence end?

Monica won the snowball fight they had against Cynthia, since
Answer: Monica had a strong throwing arm.

Problem: How does the sentence end?

Although Kenneth was much worse at writing than Joel even
Answer:
Joel couldn't argue the other is a much better editor.