[Q]: How does the sentence end?

Steven was accused by Matthew of not  participating in recycle activities because 

[A]: Matthew is serious about recycling.


[Q]: How does the sentence end?

I sprayed the bottle on my dirty red polo shirt because the 

[A]: shirt smelled bad.


[Q]: How does the sentence end?

Mark replaced his plastic drink cup with a glass one so he could see what he was drinking, the 

[A]:
plastic was obscure.