[Q]: How does the sentence end?

The regulators decided to help the environment by putting taxes on the train but not the plane because the 

[A]: plane was green.


[Q]: How does the sentence end?

Joel is more familiar with the Asian culture than Donald because 

[A]: Joel lived in Asia for many years.


[Q]: How does the sentence end?

Matthew spent the weekend watching a baby while Benjamin was on vacation, and 

[A]:
Matthew made sure the baby was fed.