[Q]: How does the sentence end?

Eric suffered from a migraine quite often but Craig did not.

[A]: Craig went to the mall.

[Q]: How does the sentence end?

Rachel put up a good defense but Cynthia still won the fight because

[A]: Cynthia was stronger.

[Q]: How does the sentence end?

It was easy for Derrick to stop smoking but not Matthew because

[A]:
Derrick had very good willpower.