answer: Mom asks Bob to help her hold the packages while she looks for the keys.
documents: #Person1#: Bob, would you come and help me?
  #Person2#: Of course. What do you want me to do, Mom?
  #Person1#: Could you hold these packages while I look for the key?
  #Person2#: Alright, what's in them? They are so heavy!
  #Person1#: Just things we need for the picnic tomorrow.
  #Person2#: Well, hurry up and open the door please. I told you these things are heavy.
  #Person1#: I'm sorry, but I just can't find the key. You must have it.
  #Person2#: Oh, yes, it's in my pocket. But how can I get the key while I'm holding all these bags?