Problem: How does the sentence end?

Jessica introduced Monica as the speaker to the club meeting because 
Answer: Jessica was the president of the club.

Problem: How does the sentence end?

The man put ice rather than lava on his lips, because the 
Answer: lava made his lips feel hot.

Problem: How does the sentence end?

Katrina was pregnant and went to go see Cynthia for a checkup, and 
Answer: Katrina underwent the checkup without issue.

Problem: How does the sentence end?

Betty turned in their report on time on Friday, while Mary asked for a two day extension, so 
Answer:
Betty spent the weekend relaxing.