Someone is ringing the doorbell. Go and see ＿＿＿＿＿＿. A. who is heB. who he is C. who is itD

问题补充：

Someone is ringing the doorbell. Go and see ＿＿＿＿＿＿.

A. who is he

B. who he is

C. who is it

D. who it is

答案：

A. who is he

B. who he is

C. who is it

(答案→)D. who it is

解析：it作人称代词,用来指代身份和性别等不明确的人。