Our headmaster spoke at the parents meeting for one hour without ________ his notes.

1. A.
   looking up
2. B.
   bringing out
3. C.
   referring to
4. D.
   learning about

Our headmaster spoke at the parents meeting for one hour without ________ his notes.

Our headmaster spoke at the parents meeting for one hour without ________ his notes.

A．looking up  B．bringing out C．referring to     D．learning about