[Q]: How does the sentence end?

Christopher practiced fire safety and Derrick did not, so 

[A]: Christopher remained calm when the fire alarm at the office building went off.


[Q]: How does the sentence end?

Brett talked Eric into learning Spanish, it was obvious to the teacher that 

[A]: Eric was a slower learner.


[Q]: How does the sentence end?

John wanted to install a shelf for his cactus but the 

[A]:
shelf was too narrow.