选择你所听到的句子( )
A:It's time to go to school.
B:It's time to go to park.
This is a book ____ London.
Where is my ? I can't find it.
The ______ are bad.
不等式x2-ax-b<0的解集为{x|2<x<3},则不等式bx2-ax-1>0的解集为( )