[Q]: How does the sentence end?

I lost weight and used an electronic scale instead of my old mechanical one. The 

[A]: electronic one was time gaining.


[Q]: How does the sentence end?

The greenhouse was a poor choice for these plants, so they were moved to the garden, since the 

[A]: greenhouse had poor conditions for growth.


[Q]: How does the sentence end?

Joel knew what was going to happen in the movie and told Aaron, so 

[A]:
Joel felt sorry for spoiling the surprise.