Question

that hat is my mother

The person () wears a hat is my mother
A.which
B .what
C.who
D.whose

Answer 1

选C,这里用who最合适.
which有时也用指人,但通常情况下在表达“一群人中的某个”时可用which指代.比如：
The boy () of the children cried in the room was my little brother.
供您参考,