[Q]: How does the sentence end?

Joseph asked Kenneth to take their dog for a walk because 

[A]: Joseph needed to work.


[Q]: How does the sentence end?

Jennifer earned royalties from the music that Katrina created, because 

[A]: Jennifer bought the rights to the music.


[Q]: How does the sentence end?

Christopher aced the exam, but Matthew failed it. The parents gave 

[A]:
Matthew a disappointed look.