   neutral   In America, most gas stations are like this.     neutral   Do I really have to do it? I don't know how.  
    neutral   Well, since this is your first time, I will do it for you.But next time, if you want a full-service gas station, you should look at the sign.     neutral   What sign?  
    neutral   Under the sign for the gas station, there will be a smaller sign that says Self-Serve or Full-Service.And some gas stations have both.But if they have both, some pumps will be self-serve and some will be full-serve.You have to look at the signs.     neutral   
 Okay, what does it mean? 
 Oh!    surprise  You haven'though, right? OK. Here's