Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

Peter is very strong. He is ____________student in his class..

This girl is ready to help peopleany time. When she is on the bus, she always herseat to someone in need.

Only after they had discussed the matter for several hours ________a decision．[ ]

If you _____the book, you ____ buy it right now, I think.