Question:
After finishing the exams, the teacher graded the papers with blue ink instead of red ink because the 

Answer:
Continue the sentence -- red was used up.


Question:
Brian doesn't like to eat baby scones, but Steven loves them because 

Answer:
Continue the sentence -- Steven has more of a sweet tooth.


Question:
The glue was applied to the legs of the sofa but not the couch. That's because the 

Answer:
Continue the sentence -- sofa legs were broken.


Question:
The tube was not big enough to cover the map, because the 

Answer:
Continue the sentence -- tube was too short.