No one can prevent the plan .
---Why is the librarian looking so hard at me?---You _______ to read aloud in the reading room.
The fire was finally brought under control,but not ________ great damage had been caused.
Cancer is proved to be second only _____ heart disease as a cause of death.
You______ her in her office last Friday; she's been out of town for two weeks.
---How did you like the food cooked by Mrs Green?---You could have had _______.