[Q]: How does the sentence end?

Brett is writing a letter to Hunter, because 

[A]: Brett wants to prove his residential address.


[Q]: How does the sentence end?

Aaron gave Nick a blender as a housewarming gift since 

[A]: Nick recently purchased the house.


[Q]: How does the sentence end?

The desk was promptly taken out of the gross room because the 

[A]:
room was infested.