Problem: How does the sentence end?

She tried to use the glue on her basement wall to seal the crack, but it failed because the
Answer: glue was weak.

Problem: How does the sentence end?

The iron was cooler than the coffee pot because the
Answer: coffee pot was still plugged in.

Problem: How does the sentence end?

Jane tried to clean the window with the sponge but she was unsuccessful because the
Answer: sponge was too small.

Problem: How does the sentence end?

The baby took formula but had to switch to breastmilk because the
Answer:
breastmilk was more satisfying.