Who knocked the door?- I’ve no idea. I just pretended nobody was at home so I didn

问题补充：

--- Who knocked the door?

--- I’ve no idea. I just pretended nobody was at home, so I didn’t ask who was.

A. he

B. she

C. it

D. that

答案：

A. he

B. she

(答案→)C. it

D. that

解析：考查代词，因为不知道外面敲门的是谁，不知道是男的还是女的，因此只能选择C

句意为，我不知道谁敲门，我就假装没有人在家，因此我没问那是谁。