[Q]: How does the sentence end?

Amy had to take a pill and Kayla didn't because 

[A]: Kayla had been well and didn't need to take medication.


[Q]: How does the sentence end?

Jason always tries to improve every situation in his life unlike William because 

[A]: William has a negative mindset.


[Q]: How does the sentence end?

Kayla is retiring after 40 years and needs to write a letter to Jennifer, so 

[A]:
Kayla starts writing.