[Q]: How does the sentence end?

Laura tended to steal while Christine was lawful, so 

[A]: Christine was never in trouble with the law.


[Q]: How does the sentence end?

The cookout invitation that bob bought would not fit with the envelope he purchased, because the 

[A]: envelope was too small.


[Q]: How does the sentence end?

The art gallery always displayed more drawings than paintings, since 

[A]:
paintings were much less popular.