> How do you say &when is the expiraton date& in Japanese?

How do you say &when is the expiraton date& in Japanese?

Posted at: 2014-06-09 
Or "when does it expire?" Also, how do say "Is it okay to steam (or boil) the vegetables? What are the cooking words for chopping and stirring in Japanese? Random phrases: I want to take the stairs, I'm going to take the stairs, can I have one chopsticks please?, which brand (food) is the best?, How long can you keep it (food) in the refrigerator? Thanks