C．Because people there cannot live at the temperature of zero.

　　D．Because wars break out among countries.

　　【解析】　细节理解题。由第三段的．..the sun is hidden by clouds of dust，and temperatures around the world fall to almost zero.可知。

　　【答案】　B

　　4．By giving the example of dinosaurs, the author tries to prove________．

　　A．animals could not live in the cold climate

　　B．what happened 65 million years ago was an invented story

　　C．the human beings will die out in 2094

　　D．the Earth could be hit by other objects in space

　　【解析】　推理判断题。恐龙的灭亡可能与彗星碎片有关，这说明作者想证明这种情况是可能的。

　　【答案】　D

　　B

　　(2017·郑州一中月考)Do you want to live forever？By the year 2050，you might actually get your wish—if you are willing to leave your biological body and live in silicon circuits(半导体电路)．But long before then，perhaps as early as 2017，some measures will begin offering a semblance of immortality(虚拟的永生)．

　　Researchers are confident that technology will soon be able to track every waking moment of your life.Whatever you see and hear，all that you say and write，can be recorded，analyzed and added to your personal chronicles(履历)．By the year 2030，it may be possible to catch your nervous systems through electrical activities，which would also keep your thoughts and emotions.Researchers at the laboratories of British Telecommunications have given the name of this idea as Soul Catcher.

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