B. anyone famous.为什么呢？给我讲讲好不好？you have to use 'anyone' in a question because it is not an exclusive term. It is because you do not know if the person you are asking do, in fact, know someone famous.It is a grammatical rule to use negatives in a question. Or, using negatives in something you do not know.Exception: When you offer someone something not knowing if the person will take it or not, you use an exclusive term. Example: Do you want some money? Not do you want any money?