题目内容：

who's the man at the door A He is a doctor; B He is a friend lf mine; C He is a famous dinger

优质解答

B.He is a friend of mine
who问的是谁,答案一般用姓名 或者 某某的xx
what问的职业：what is your brother?He is a basketball player
how问的是身体状况 How are you?Fine,thank you.
其它就不用说