May I speak to Liu Yun?A.Yes,please.B.I am Liu Yun.C.Speaking.
问题描述：
May I speak to Liu Yun?A.Yes,please.B.I am Liu Yun.C.Speaking.
答
选C
这是打电话的常用语，不用问原因，你记住这个问答模式就行了。
答
C
电话用语
答
b