We all hold the belief that men are created    and should be treated   .

Since the office building is being repaired and painted, we will have ______ offices in the hotel．

_______, and students having returned, the school will start with ________ effort in the work that lies before it. 

---Did you have a sound sleep last night? --- Yes, never slept ________.

6. As there is less and less coal and oil, scientists are exploring new ways of making use of   energy, such as sunlight, wind and water for power and fuel.