Oh,there is someone in the room.()must be my brother A heB ItC Sh_英语解答

Oh,there is someone in the room.
()must be my brother
A heB ItC SheD

人气：446 ℃　时间：2020-03-21 03:59:21

解答

B
it 做代词指代未知的人（不确定的人）或者婴儿和物体