题目

Many people in the world live in big cities ,which are often dirty and difficult places to live in .And some cities will get bigger .They will also get higher and lower ,because people will begin to live in tall buildings as well as under the ground .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 is a new war .There are underground cities in Switzerland and China ,built by the government 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 .Peop;e will not go blind because there will be light underground ,but they may change in some way .Scientists say that people who live

提问时间：2020-07-26

答案

fales
fales
fales
true
fales