Bob asked his mother -A.what to do it B.how to do C.where to live A.B.为什么不可以呢?

Bob asked his mother -A.what to do it B.how to do C.where to live A.B.为什么不可以呢?
Bob asked his mother -
A.what to do it B.how to do C.where to live
A.B.为什么不可以呢?

Bob asked his mother -A.what to do it B.how to do C.where to live A.B.为什么不可以呢?
B.how to do 缺少成分 how to do it
A.what to do it 缺少成分 .what to do with it