Problem: How does the sentence end?

I loved my old comb better than my new brush, because the
Answer: comb was much sturdier.

Problem: How does the sentence end?

Sam gave away his books but kept his VHS tapes when he moved because the
Answer: books are ubiquitous and worthless.

Problem: How does the sentence end?

Rachel was very concerned about the environment but not Cynthia.
Answer: Rachel always recycled all their paper and plastic bottles.

Problem: How does the sentence end?

Lawrence had longer shoelaces than Ian had on their shoes so
Answer:
Ian tripped less often.