sentence: Since childhood Elena dreamt of marriage but not Amy, as 
complete: Elena always hated being alone.

sentence: A tortoise crawled in front of William's car, so Nelson got out of the passenger seat to move it away. 
complete: Nelson got back into the car once it was safe.

sentence: Cynthia prefers a gas grill while Monica does not because 
complete:
Cynthia doesn't like the smoky flavor of a charcoal grill.