For many years scientists have said that the earth is getting warmer. Now they have found

For many years scientists have said that the earth is getting warmer. Now they have found something new-hot cities! In the southern US, they have found that cities become very hot in summer. For example, the city of Atlanta in Georgia has roof(屋顶) temperature of up to 50oC while it is 27℃ in the streets! At night, the outside of buildings stays so hot that the heat of the city causes storms over the city!
China also has the same kind of problems. Every year more farmland is used for factories or offices. More housing is needed, too. As people become richer, they buy more cars. New roads are needed and new car parks are built in the city centers. This all makes cities hotter.
It isn’t easy to change the situation. City planners say that we should plant more trees in the middle of cities. Every new street should have trees on both sides, they say. Trees make the temperature lower, so we should have more trees in our parks and squares. We should also paint our roofs white. If we do this, they do not become so hot. Every roof in a hot and sunny country should have solar(太阳的) roof panels. The electricity from these can be used to run the air conditioners (空调)in the buildings.
People continue to cut down forests around the cities. This makes the problem worse. Cities are growing faster and faster. By the year 2025, four fifths(五分之四) of the population will be living in cities. If we go on like this, there will not be enough farmland to feed everyone in the world
【小题1】The scientists have found .A．cities become very hot in summerB．Atlanta is the hottest city in AmericaC．there are not as many storms as beforeD．it is not as hot on the roof as in the street【小题2】The way to make the city cooler is to .A．plant more treesB．try to use air conditioners moreC．build more parks and squaresD．paint the roofs of all the white buildings【小题3】What will probably happen in the future according to the fourth paragraph(段落)?A．Cities won’t grow very fastB．We will not have enough foodC．Most people will move to the countrysideD．People will plant more trees outside the cities【小题4】What is the best title(题目)for the passage?A．More Farmland Is NeededB．Trees Make Cities CoolerC．Cities Are Getting HotterD．Scientists Are Worried About StormsA

(答案→)A 解析：【小题1】根据文章内容For many years scientists have said that the earth is getting warmer可知答案为A【小题2】根据文章内容It isn’t easy to change the situation. City planners say that we should plant more trees in the middle of cities.可知答案为A【小题3】根据文章内容If we go on like this, there will not be enough farmland to feed everyone in the world，可知答案为B【小题4】根据文章内容可知大意和标题为C

就是这个解释