我国《文物保护法》规定，革命遗址、纪念建筑物、古文化遗址、古墓葬、古建筑、石窟寺、石刻等文物，根据它们的( )价值，分为三个不同级别的文物保护单位。
The time has come _____ we make extensive use of nuclear energy.
We all found_____ to play the game.
Rock: ______.
Sharon: Very well, and the experiment is nearly finished.
I am ____grateful for the many kindnesses you have shown my son.
Unless all the members agree to __8__to the plan there may be further development in the course of action.
This price is ____ of your 5% commission.
Nowhere but in the remotest region of the country ____find a place to settle down.
Faced with rapid inflation and _____ international and home markets, many firms havedeclared bankrupt.
One of the requirements for a fire is that the material ____to its burning temperature.
I often thought of my childhood,____I lived on a farm.