what can a dog sometimes be taught to do?\nOptions:\n- shake hands\n- accident\n- guard house\n- drink water\n- stray
Let's think carefully first. Step-by-step reasoning process:
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Shake hands is clasp someone’s right hand in one’s own at meeting or parting, in reconciliation or congratulation, or as a sign of agreement. A dog sometimes can be taught to shake hands. So the final answer is shake hands.
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