Moves to block cultivation of genetically modified crops in the developing world can no longer be tolerated on ethical or moral grounds,the government's chief scientist, Sir John Beddington, has warned. He said the world faced " a perfect storm" of issues that could lead to widespread food shortages and public unrest over the next few decades . His warning comes in the wake of food riots in north Africa and rising global concern about mounting food prices ."A number of very important factors are about to change our world , " said Beddington , an expert in population biology. " its population is rising by six million every month and will reach a total of around 9 , 000 million by 2050 . At the same time . it is estimated that by 2030 more than 60% of the population will be living in cities and will no longer be involved in growing crops or raising domestic animals. And on top of that the world's population is getting more prosperous and able to pay for more food.&q
1 . why can't the block of cultivation of GM crops be tolerated , according to Sir John Beddington ?
- A、The food prices can only be kept under control by planting GM crops.
- B、The technological development makes it possible to have a new planting.
- C、The conventional planting can no longer satisfy the increasing demand
- D、The cultivation of GM crops is the only way to ensure the social security.
正确答案:C
答案解析:有
3 . How can the tropical rain forests and the savannahs help keep a healthy climate , according to Beddington ?
- A、They can keep the land from getting desertification .
- B、they can absorb the carbon dioxide released into the air.
- C、they can contribute to the balance of the ecosystem .
- D、they can smooth the changes of extreme weathers .
正确答案:B
答案解析:有
5 . the purpose of the author to write this passage is to_
- A、make people keep more food stock for themselves .
- B、give people the description of a perfect storm.
- C、introduce the biotechnological companies like GM.
- D、make people realize the importance of the food problem.
正确答案:D
答案解析:有
4 . what does the phase " silver bullet" ( line 2 , Para . 4 ) mean ?
- A、A wonderful modern biotechnological technique.
- B、One way that can justify using GM as a new technology .
- C、A small metal object that is made of silver and fired from a gun.
- D、One method that instantly solves the global food problem.
正确答案:D
答案解析:有
2 . According to Beddington , what may be one factor that is about to change our world?
- A、The growth rate of the world population reaches an unprecedented high .
- B、People are becoming richer and richer to pay for the high-priced food .
- C、The riots and other social insecurities will appear around the world .
- D、More people will need food while less people will grow food.
正确答案:D
答案解析:有
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