A: I need your help with something. B: What's wrong? A: I somehow locked myself out of my apartment. B: How did you lock yourself out? A: I'm really not sure. B: Where's your key? A: I locked it inside the house. B: I do have a spare key to your door. A: May I use it, please? B: Okay, but once you get in, bring my key right back. A: I will, and thank you so much. B: Make sure to keep your key with you next time.