[Q]: How does the sentence end?

The gym trainer was teaching everybody how to get bigger arms before legs, since the 

[A]: arms are weaker.


[Q]: How does the sentence end?

The surgeon was able to reattach the severed finger, but not the toe, because the 

[A]: finger injury was recent.


[Q]: How does the sentence end?

Megan was helping Sarah build a dark room because 

[A]:
Megan had a lot of experience working in construction.