题目内容：

A team of engineers1.(create)a super-thin material that could help keep buildings cool.The team developed the revolutionary new material,2.is very thin and can cool objects even under direct sunlight.The material does not need energy to work3.does it need water to help keep things cool.The engineers say4.new material could provide an answer to air conditioners,which are expensive5.(run).The material is unlike anything6.(find) in nature.It is just 50 micrometers thick.That's slightly7.(thick) than the aluminum foil（锡箔纸）we use for cooking.

The engineers explained how their new material works.They said when it is put on top of something,two things happen.It cools the object underneath by8.(reflect) the sun's rays back into space.At the same time,the material removes the object's own heat and sends that into the air.An engineer said:"We're excited about the opportunity to explore potential uses in different scientific9.(field)."Another researcher said:"Just 10 to 20 square meters of this material on the rooftop could10.(nice) cool down a house in summer."