[Q]: How does the sentence end?

Prevent motion sickness was understandable to Mary but not to Patricia because 

[A]: Mary was often motion sick as a youngster.


[Q]: How does the sentence end?

Jessica could see the clear out of the forest while Mary came up with a plan because 

[A]: Mary was a leader.


[Q]: How does the sentence end?

Samuel practices the guitar for hours on end but Brett does not. 

[A]:
Samuel becomes a big rock star.