This question already has an answer here:

Quick question, can I use Smallpox and choose to sacrifice Strip Mine but in response sacrifice Strip Mine to use it's effect too?

marked as duplicate by diego, Hackworth, Toon Krijthe, murgatroid99 magic-the-gathering Jun 24 '15 at 20:22

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.