Problem: How does the sentence end?

Since Matthew studied physics while Ian studied English,
Answer: Matthew knew a lot about science and testing.

Problem: How does the sentence end?

Megan tried to make it as painless as possible when they gave Christine the bad news, but
Answer: Christine was devastated anyway.

Problem: How does the sentence end?

One can tell that Nick works out but not Matthew because
Answer: Matthew has a lot of underarm fat.

Problem: How does the sentence end?

My lips were dry so I tried just drinking water but switched to balm instead since the
Answer:
water was useless.