B. Many health experts say that Africa’s poverty and politics are to blame for diseases that in most developed countries are easily preventable. International health agencies set out more than two years on a $2 billion campaign to stamp out the global threat of polio, the world’s largest-ever health initiative. They believed they could eradicate the virus by the end of this year. Not any more. In Africa, which has most of the world’s polio cases, politics and armed conflict have played a major role in stalling the polio eradication program. In northern Nigeria, government officials suspended the polio program two years ago after rumors spread that the vaccine caused sterility and AIDS. Health workers sent in to vaccinate children were taunted or stoned. Although Nigerian health authorities have resumed the eradication program, the damage was done. Polio rebounded in northern Nigeria and spread to at least 17 other countries that had been polio-free. Sudan is one of them. The number of confirmed cases of polio-induced paralysis in Sudan soared to 54, a dramatic and dangerous rebound in a country that had eradicated the virus just four years ago. 【題組】42. What is the main topic of this passage?
What will life be like in the future? Many people are busy making predictions about the future. Scientists and engineers find out how current technology can be further developed. Other scholars are deeply concerned about ecology and the kinds of energy we should use to protect the environment in the future. Writers put their imaginative ideas about the future into science fiction novels. One example is Frankenstein by Mary Shelley, which is a story about a scientist who tried to create a new human being. Today science fiction writers write about life on other planets and how human beings can live longer. People from all walks of life are involved in thinking about the future because our survival may depend upon it.
【題組】8 According to people who study ecology, human beings need to find new sources of energy that will .
(A) destroy the environment (B) protect the planet we live on
(C) change the geography of the earth (D) help us go to other planets