[Q]: How does the sentence end?

Lawrence has an anxiety disorder and Jason does not, so 

[A]: Jason doesn't take any medication.


[Q]: How does the sentence end?

Leslie was much better at card games than Kyle was, so 

[A]: Kyle sought to learn from him.


[Q]: How does the sentence end?

Donald has the most intelligent little dogs thought Dennis, 

[A]:
Donald is a dog owner and teaches them many things.