[Q]: How does the sentence end?

I wanted to write the letter using a pen instead of a marker. Using the 

[A]: pen would look neat.


[Q]: How does the sentence end?

Robert was a lot better at learning compared to Benjamin, by reason that 

[A]: Benjamin never listened.


[Q]: How does the sentence end?

It was easy for Michael but not Eric to find a replacement part for the car because 

[A]:
Eric did not work in the auto mall.