[Q]: How does the sentence end?

Mary would rather swim in the pool and not the lake because the 

[A]: pool was clean.


[Q]: How does the sentence end?

I transferred my new photos from the memory card into the hard drive until the 

[A]: hard drive was full.


[Q]: How does the sentence end?

The choice of fabric for the clothes instead of using a composite was made because the 

[A]:
composite was stiff.