听力原文:W: Tom.do you want to go shopping with me this morning? M: Sure,but I can't leave right now.I've lost my room key and I have to want for the security guard to let me back into my room. Q: What is Tom's problem? (14) A.He won't go shopping without a guarD. B.He left his room key in a shop. C.He can't get into the guard room. D.He couldn't find his room key.