[Q]: How does the sentence end?

In class, Kyle often tried to copy Jason's homework, because 

[A]: Jason always knew the correct answers.


[Q]: How does the sentence end?

Staying trim was not important to Brian , but was essential to Brett , so 

[A]: Brian never watched his calories.


[Q]: How does the sentence end?

Because Nick is a loyal customer at Lawrence's old tile store, 

[A]:
Nick is always right.