I really don't know_____ about it.选择(初二)

问题描述:

I really don't know_____ about it.选择(初二)
A how to do B what to do C how can I do D what can I do
选什么?为什么?

B.因为句子缺少TO DO 的宾语成分,恰好WHAT满足这一条件.