Nobody can live________ fresh air and clean water. A．with B．

tell

B
reply 后面一定要有to
要不这句就可以说成 nobody can reply.

A 情态动词can 后面加动词原形

What kind of homes will we live in the future?Nobody can be sure,but scientists are working out new ideas now.
什么样的家园,我们生活在未来?没有人能确定,但科学家们正在工作的新思路.
　　Some scientists are thinking about building whole cities under huge glass domes． Of course ,advanced heating and cooling systems will be necessary to control the weather in the domes．Therefore ,there will never be any rain or snow,and the temperature will always be comfortable ．
一些科学家对巨大的玻璃穹顶下的整个城市建设的思考.当然,先进的加热和冷却系统必须控制在圆顶的天气.因此,就永远不会有雨或雪,和温度始终舒适.
　　Perhaps everyone will live in vertical cities that are so large that they can contain all the necessities of life．Since vertical cities will use less land than flat cities,and provide homes for more people,they will be practical for small countries that have a large population．
也许每个人都将生活在如此之多,它们可以包含所有的生活必需品的垂直城市.由于垂直城市将使用比平坦的城市土地少,给更多的人提供居所,他们将实际的小国家,有一个大的人口.
　　Another idea that will be helpful to small countries is the floating city．Monaco has already built homes,stores,and offices on the water of the Mediterranean Sea．
另一个想法,将有助于小国是漂浮的城市.摩纳哥已经建成的房屋,商店,和在地中海的水办事处.
　　There are some people who think that we will go back to living in caves． But the caves of the future will be very different from the caves of the Stone Age．Farms and parks will be on the land over the cave city．When people want to go to the country or to a park,a short ride in a lift will take them there．
有些人认为我们会回到洞穴里生活.但洞穴的未来将从石器时代的洞穴非常不同.农场和公园将在土地在洞穴城市.当人们想去的国家或一个公园,在电梯中的一个短短的车程将带他们到那里.