问题补充：
Many people in the world live in big cities, which are often dirty and difficult places to live. So, some cities will get bigger. They will also get higher, and lower, because people will begin to live under the ground as well as in tall buildings. Scientists also say that men can begin to live in cities under the sea, when there is not enough space on the land. Of course, these new cities will be very expensive, and difficult to build, but they are not impossible. Already, some countries are building places to live under the ground so their people can go there if there is a new war. There are underground cities in Switzerland（瑞士）and China, built by the government（政府）to help some of the people live during a great war.
But will people change if they live under the ground for a long time？For example some fish go blind if they live in the dark sea for a long time. People will not go blind, because there will be light underground, but they may change in some way. Scientists say that people who live in cities today are losing their senses of smell, touch and taste. They can’t smell the dirty air, they can’t taste the chemicals（化学制剂）in their food. These senses are not as strong as before, when people lived in the country and grew their own food. The city has changed that. What will the underground city change in everyone？
【小题1】People will live under the ground because ．A．it’s neither hot nor cold thereB．they’ll be afraid of the war C．there’ll be less space on the groundD．they’ll make their life comfortable【小题2】Some countries try to build some places under the ground so that people will be able to live there ．A．when summer comesB．when a war breaks out C．because they think it’ll be safer for themD．when they’re fed up with the life on the land【小题3】, so people who will live there won’t go blind．A．There’ll be enough light under the ground B．It’ll be easy to go upstairs C．Glasses will be sold under the ground D．Medicine will be supplied for free【小题4】People will lose some senses under the ground because ．A．the world are polluted B．it’s dark there C．the air is dirty and there are a lot of chemicals in their food D．they can’t grow their own food in the sunC
答案：
(答案→)C
解析：本文在叙述随着城市的发展，地下城市的出现会给人们带来许多的变化。
【小题1】C细节题。城市发展会使空间不够，因为就会向地下发展，故选C项
【小题2】B细节题 。从第一段There are underground cities in Switzerland（瑞士）and China, built by the government（政府）to help some of the people live during a great war.得出B项
【小题3】A推断题 从最后一段 People will not go blind, because there will be light underground, but they may change in some way. 推断出答案来。
【小题4】C细节题。从最后一段They can’t smell the dirty air, they can’t taste the chemicals（化学制剂）in their food得出C项正确。
