[Q]: How does the sentence end?

The website designed by Eric looked very professional but Nelson's website looked shoddy, since

[A]: Nelson did not have a degree in website design.

[Q]: How does the sentence end?

The extinguisher could not quench the fire in the kitchen because the

[A]: extinguisher is weak.

[Q]: How does the sentence end?

Katrina celebrates Christmas every single year with their family while Tanya celebrates Hanukkah with theirs.

[A]:
Tanya practices Judaism.