[Q]: How does the sentence end?

Joe didn't like metal chairs without a cushion because the 

[A]: metal was uncomfortable when sitting a long time.


[Q]: How does the sentence end?

Robert invited Joseph into his big tent on a spring camping trip, because 

[A]: Robert wanted some company.


[Q]: How does the sentence end?

Betty talked to Sarah about her boyfriend. He made her extremely happy.  

[A]:
Sarah envied him.