[Q]: How does the sentence end?

Kevin just got a new bike from Nick for his Birthday, so 

[A]: Nick is very thoughtful.


[Q]: How does the sentence end?

Christopher but not William would make a good babysitter because 

[A]: Christopher knew how to handle small children.


[Q]: How does the sentence end?

Christopher always gets knocked down by Steven when they fight each other in the boxing ring. 

[A]:
Christopher is weak.