Has the doctor called for?
A. referred to being
B. referred to been
C. referring to being
D. referred to be
网友回答
A. referred to being
(答案→)B. referred to been
C. referring to being
D. referred to be
解析：考查动词。句中referred to作定语，修饰the doctor，所以应当为Has the doctor been called for？故选B。