A farm planted levels or floors is called a vertical(垂直的)farm. A skyscraper type building can house a vertical farm. Since the garden is built upwards，rather than outwards，it requires much less space than a conventional farm.
The world is quickly running out of room for conventional farming. Vertical farms could be a key to this situation. An 18story vertical farm could feed as many as 50,000 people，all in an area which is the size of the average city block. Vertical farms in the city could cut down on transportation costs as well. Think about the amount of fuel it takes to transport food from farmland to city. The resources saved would be surprising. Besides saving travel time，food would be delivered in fresher condition and with less damage.
There is a growing concern about the use of pesticides(杀虫剂) in agriculture today. But the vertical farm would be a greenhouse type environment, avoiding the need for a large number of pesticides. Vertical farms can be built in a contained space，therefore they are an excellent solution for living well in an environment far different from our own. Hydroponics(水耕法) could be a big part of vertical gardening. This would reduce the amount of soil needed to grow food. Of course，not all food does well with this type of planting，but there are many crops that actually seem to do better.
In some climates，a lack of sunlight creates a short growing season. The solar power option may not work as well here. The addition of grow lights would make it possible to grow crops in vertical gardens in these areas .In other words，we could grow crops in areas where we never could before.
Vertical farms may just be a concept for now，but they are a concept that will solve many of our problems in the future.
68. According to the passage, a vertical farm ________.
A. is mainly built outwards B. is dependent on solar power
C. is planted on levels upwards D. is only an environmental friendly farm
69. Compared to the conventional farm, the vertical farm can ________.
A. depend far less on sunlight B. greatly increase the use of soil
C. help to protect the limited gardens D. reduce the harmful effect of pesticides
70. It can be learned from the passage that vertical farms ________.
A. have already been put into use B. only use hydroponics to grow food
C. need less room than conventional farms D. may increase the transportation costs
71. What would be the best title for the passage?
A. Vertical farms for our future B. Ways to deal with future problems
C. Vertical farms and green skyscrapers D. Making full use of our limited land
阅读快车系列答案科目：高中英语 来源：桂壮红皮书活题巧解巧练 高考英语 题型：050
阅读下列短文，从每题所给的四个选项（A，B，C和D）中，选出最佳选项。
A hundred years ago, Hong Kong was just a small fishing village. There were only a few thousand people. They lived a simple life.
Houses were two-storeyed then at most. There were no buses or cars. While poor people traveled on foot, the rich traveled by rickshaw(人力车). The roads were covered with stones. There were no big ships or ocean liners. People sailed on small boats or sampans(舢板).
Within the last hundred years, there has been great important everything. People worked hard to make Hong Kong a commercial(商业的) center. Multi-storeyed buildings, wide roads and flyovers can be seen everywhere we can travel by bus, tram, taxi or underground. Planes and ocean liners come from different parts of the world every day.
Hong Kong is now a famous city. Many people from other countries do business or work here, the city already has over six million people and there will be more in the future. Life in Hong Kong is not simple at all nowadays. People must work harder in order to make a living.
It is more than five years since Hong Kong returned to China in 1997. Our PLA soldiers have stationed there. We are sure Hong Kong will have a more beautiful future.
1．One hundred years ago, Hong Kong was ________.
[ ]
A．a small city
B．a small farm village
C．a small fishing village
D．a commercial center
2．At that time people went out to sea ________.
[ ]
3．There has been great improvement in Hong Kong within the last hundred years ________.
[ ]
A．because of the hard work of the people in Hong Kong
B．because Hong Kong is very famous
C．because lots of people have worked there
D．because of its return to China
4．Name four things which show Hong Kong is a modern city.
[ ]
A．small fishing village, underground, car and shops.
B．taxi, multi-storeyed buildings, flyovers and wide roads.
C．roads covered with stones, multi-storeyed buildings, tram and bus.
D．planes, sampan, ocean liners and big shops.
5．What's the passage mainly about?
[ ]
A．Hong Kong
a hundred years ago.
B．Hong Kongthe past and the present.
C．Hong Konga modern city.
D．Hong Kong's return to China.
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