[Q]: How does the sentence end?

The student tried to use the old pen to fill out the application but the 

[A]: pen was too old.


[Q]: How does the sentence end?

Katrina could feel her period coming. So when she snapped at Angela, 

[A]: Angela thought it was probably out of rudeness.


[Q]: How does the sentence end?

The airplane was very scary for Craig and not Ian, because 

[A]:
Ian always flew on planes.