2. 外语
  3. For the first time in history, evolution has taken a backseat. There is an ongoing realization that human beings are capable of

For the first time in history, evolution has taken a backseat. There is an ongoing realization that human beings are capable of

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问题     For the first time in history, evolution has taken a backseat. There is an ongoing realization that human beings are capable of directly shaping their own evolution. As we case into the twenty-first century, we realize that genetic engineering is undoubtedly going to have a dramatic【C1】______on our lives. It seems that with genetic engineering, science has moved from【C2】______the natural world to redesigning it.  Now we must ask ourselves【C3】______this influence will be for better or for worse. However, scientists remain【C4】______in their opinions. Some have【C5】______against the hazards of genetic engineering,【C6】______others have dismissed these perils as inconsequential. Lewis Wolpert, professor of biology at University College London, says, "There are no ethical【C7】______because you are not doing any【C8】______to anyone." And the gist of his statement is staunchly supported by James Watson, a Nobel Prize winner. "If we can make better human beings by knowing how to change【C9】______, why shouldn’t we do it?" They are both extremely【C10】______of excuses that genetic engineering is a bad idea.【C11】______, two other prominent scientists have【C12】______their displeasure about genetic engineering. They have made no【C13】______of the rather strong and true feelings【C14】______genetic engineering. George Wald, Nobel Prize winning biologist wrote recombinant DNA technology【C15】______our society with unprecedented problems in the history of science. It places in human hands the【C16】______to redesign living organisms, the【C17】______of some three billion years of evolution. It is happening too fast. It【C18】______probably the largest ethical problem, for going【C19】______in this direction may be not only unwise but【C20】______.
【C3】
选项 A、whether
B、either
C、neither
D、rather
答案A
解析 结构衔接题。这里要表示两种情况之一，用whether…or…，选A)。whether在这里引导的是一个问题。这句的意思是“现在我们必须问自己这种影响是好的还是不好的”。either也能和or连用表示二者之一的意思，但是either不能表示提问。neither和rather都不能与or搭配使用，排除。
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