2017届北京市高考英语一轮复习综合练习：2（含解析）_高考复习指南

2017届北京市高考英语一轮复习综合练习：2（含解析）

　　D．More environmental damage being caused．

　　66．Which suggestion, is made for reducing oil tank accidents according to the passage?

　　A．We should build safer tankers in the near future．

　　B．We should develop new technologies to cut oil use．

　　C．Tankers should not be allowed to sail near the coastlines．

　　D．Countries should build more oil pipelines under the sea．

　　Recently there was a major discovery in the scientific research—the mapping of all DNA in a human gene（基因） is complete．Couple of years ago, this seems an impossible task for scientist to accomplish．All this progress in science leads us to believe that the day, when the human being will be cloned, is not far away．Human cloning has always been a topic of argument, in terms of morality or religion．

　　Taking a look at why cloning might be beneficial, among many cases, it is arguable that parents who are known to be at risk of passing a genetic limitation to a child could make use of cloning．If the clone was free of genetic limitations．then the other clone would be as well．The latter could foe inserted in the woman and allowed to ripen to term．Moreover, cloning would enable women, who can't get pregnant, to have children of their own．

　　Cloning humans would also mean that organs could be cloned, so it would be a source of perfect transfer organs．This, surely would be greatly beneficial to millions of unfortunate people around the world that are expected to lose their lives due to failure of single （or more） organ （s）．It is also arguable that a ban on cloning may be unlawful and would rob people of the right to reproduce and limit the freedom of scientists．