Dan Bebber is a senior research fellow at the University of Exeter in Britain. He says res

Dan Bebber is a senior research fellow at the University of Exeter in Britain. He says research has shown that wild plants and animals are moving toward Earth's North and South poles as the planet warms.
Mr Bebber wanted to know if the same thing was happening with organisms that attack agricultural crops. He examined reports of first sightings of new insects and diseases around the world. The records came from CABI - the Centre for Agricultural Bioscience International. He says the group began collecting information from developing and industrialized countries years ago.
Dan Bebber and his research team studied 612 different organisms - from viruses and bacteria to insects like beetles and butterflies. They found that since 1960, crop pests and diseases have been moving toward the poles at an average rate of about 3 kilometers each year. Mr Bebber says this puts the most productive farmland in the world in danger.
As new species of pests and diseases evolve and potentially the environment for them becomes more amenable at higher latitudes, the pressure on the breadbaskets of the world is going to increase.
Farmers face other threats. Invasive species passed through trade are also causing problems. Gene Kritsky is an Entomologist at the College of Mount St. Joseph in Ohio. He specialises in the study of insects. He says climate change may improve conditions for some invasive species.
“It means that species in other parts of the world that might do well in warmer temperatures can now do well in the breadbasket of America.”
Another Entomologist Christian Krupke of Purdue University says the effects of these changes will depend very much on the crop, the insect and the disease. But he says the research is a warning sign that people should care about climate change and do something about it.
【小题1】The purpose of Dan Bebber’s research was to find .A．if farmland could be moved to colder places thanks to global warmingB．if diseases and insects harmful to crops were going towards colder areasC．if organisms were moving to the north and south polesD．if the number of crop pests was increasing【小题2】According to Dan Bebber, if crop pests keep moving towards the poles, .A．it will be hard for farmers to kill themB．the most productive farmland will produce more cropsC．the earth will not produce enough food to support the worldD．the conditions for some crops may be improved【小题3】Which of the following is not a threat that farmers have to face?A．Climate change helps crop pests to adapt to new environment.B．Foreign species are brought in by trade.C．Invasive species doing well in warmer places might do well in America.D．The impacts of the climate and species changes on crops are not easy to determine.【小题4】The underlined word “amenable” in the fourth paragraph most probably means .A．agreeableB．terribleC．unfriendlyD．changeableB

(答案→)B 解析：本文讲述的是随着全球变暖，很多植物都在向两级地区移动，科学家对这种现象进行了仔细地研究。本文介绍了这些研究的有关情况。【小题1】B 细节题。根据文章第二段第一行Mr Bebber wanted to know if the same thing was happening with organisms that attack agricultural crops可知他想知道这些对动物和昆虫有害的疾病是不是和那些植物一样会向南极和北极移动。故B正确。【小题2】C 推理题。根据文章第三段最后一句Mr Bebber says this puts the most productive farmland in the world in danger.可知这种情况会让地球上物产丰富的土地不再能够生产出产品来满足人们的需要。故C项正确。【小题3】D 细节题。根据As new species of pests and diseases evolve and potentially the environment for them 和Farmers face other threats. Invasive species passed through trade are also causing problems.以及He says climate change may improve conditions for some invasive species.说明ABC三项都是面临的威胁。只有D项文章没有涉及到。【小题4】A 猜测词义题。根据本句As new species of pests and diseases evolve and potentially the environment for them becomes more amenable at higher latitudes,在高纬度地区新的昆虫和疾病以及他们与环境之间越来越协调一致。故A正确。

这个问题我还想问问老师呢