.Let’s ______ the children into 4 groups. Each group will have a ______ room to sleep in.

Yang Liwei is a hero, but a _________. 

—Has the design of the city square been decided?—No, it’s still ______ to suggestions.

My house is very _____ for getting to work as it is only a few minutes from the station.

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.