[Q]: How does the sentence end?

The recipes that my mom had in her mind wouldn't fit in two books, because the 

[A]: books were too few.


[Q]: How does the sentence end?

Kevin would talk far more often at parties than Aaron for the reason that 

[A]: Kevin was way more extroverted.


[Q]: How does the sentence end?

The light did not make it to the other side of the room through the curtain because the 

[A]:
curtain was heavy.