Not until liberation _ he __free.

Tom_______two of his classmates_______invited to the party.

n problems such as energy crisis, pollution and populationexplosion_________, people are asked to share the bitterness and endure thehardship with all the whole nation of the times．

Any danger for the patient ________ on by Dr. Smith—Hard to say. Doctors are trying their best.

Rosy came in for _________ coffee and told me _________ firecrackers outside kept her awake last night．