[Q]: How does the sentence end?

Ian slipped on oil that Donald spilled all over the kitchen floor. 

[A]: Ian was angry.


[Q]: How does the sentence end?

Joseph helped to prevent the disease in Brett's body during the overwhelming plague because 

[A]: Joseph was a doctor.


[Q]: How does the sentence end?

Benjamin played the game a lot better than Brian because 

[A]:
Benjamin had played many times before.