By the year 2050，it is said that the world's population will reach nine billion.With such a large population to feed，what should we do to provide everyone with enough food in the future？What will happen if everyone needs more meat in the diet？Food supply is going to be a big headache.
   Australian journalist and science writer，Julian Cribb，explains the challenges.Cribb says there is a major problem in the current food system，especially in the developed world.As more and more people move towards city centers，the less and less they know about where their food comes from.Most think food simply grows on supermarket shelves，and they don't consider the environmental effects of food production.
   Food also has many hidden costs：huge amount of water，energy，and land degradation （退化）.Consumers add their own costs by simply throwing away a lot of food.The figures for food waste in West are surprising.
   To solve this problem of public ignorance（無(wú)知）about food，Cribb suggests that food should be taught as a subject at primacy school.This would help to create a future generation that could better deal with the world's coming food challenges.This powerful measure can help them become more educated consumers，more productive farmers，and so on.
   Cribb offers other solutions and suggestions as well.One is to increase the money for agriculture（農(nóng)業(yè)）research，which has not been taken seriously so far.He also suggests organic（有機(jī)的）fanning should be understood on a scientific basis.People should change their fixed thinking and get the very best out of organic farming systems.By doing so，we may know how to stop wasting water and learn how to grow food more cheaply.Besides，Cribb asks all consumers to eat more fruits and vegetables.Compared with meats，they take less time and water to grow so that they are much greener as food and more friendly to the environment.

（1）What is the main problem about food mentioned in the 2nd paragraph？

B

B

A．Increasing ignorance about food production.
B．Food production doing harm to the environment.
C．An increasing number of people moving to city centers.
D．Over population with nine billion people to feed.
（2）Which of the following is NOT a reason for making food a subject at school？

D

D

A．To train more productive farmers.
B．To educate students about food production.
C．To better prepare students for future food challenges.
D．To help students understand more about city environment.
（3）What is the structure of the passage？

A

A

（P1=Paragraph 1 P2=Paragraph2 P3=Paragraph3 P4=Paragraph4 P5=Paragraph5）
A．
B．
C．
D．
（4）The text is mainly about

C

C

.
A．public blindness about food and education
B．organic farming and its research
C．food problems in the future and some solutions
D．the world's population in 2050 and the environment