问题描述：
问个英语问题```高一的
It is announced ( ) has been a good deed done by Mr.Brown.
A.that which
B.that who
C.that that
D.that why
请大家解释下为什么选C而不选A呢?which不也可以作代词么?
It is announced ( ) has been a good deed done by Mr.Brown.
A.that which
B.that who
C.that that
D.that why
请大家解释下为什么选C而不选A呢?which不也可以作代词么?
问题解答：
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