Question:
The boy knows how to use commas, but can't figure out apostrophes, so the 

Answer:
Continue the sentence -- apostrophes are demanding to learn.


Question:
Everyone wanted to be a mermaid at the Halloween party, but the costume at the store only fit Christine and not Jennifer because 

Answer:
Continue the sentence -- Christine was slender.


Question:
Kenneth printed out paper for a presentation for his report to Derrick because 

Answer:
Continue the sentence -- Derrick is his superior.


Question:
When Samantha dropped a glass bowl and broke it, Betty yelled. 

Answer:
Continue the sentence -- Betty felt frustrated about the bowl.