[解析]
(1)B 细节理解题.根据第二段Mass adoption of the Internet is driving one of the most exciting social,cultural,and political transformations in history,and unlike earlier periods of change,this time the effects are fully global,"Schmidt and Cohen write in their new book The New Digital Age.可知,两个人都认为网络的影响是全世界的,故答案为B.
(2)C 细节理解题.根据But if the book has one major shortcoming,it's that authors don't spend enough time applying a critical eye to the role of Internet businesses in these sweeping changes.可知书的不足之处是作者没有时间以一种批判的眼光来看待电子商务所扮演的角色.故选C.
(3)A 细节理解题.根据They paint a picture of a world in which individuals,companies,institutions,and governments must deal with two realities,one physical,and one virtual.可知未来的人们生活在两种现实中.故选A.
(4)D 推理判断题.根据By using this concept as a starting point,the authors aim to move beyond the now familiar optimist vs.pessimist dichotomy (对立观点)that has characterized many recent debates about whether the rise of the Internet will ultimately be good or bad for society.可知近期对于网络的兴起对社会来说最终是利还是弊的争论,大多是持乐观或悲观的对立观点,而本书的作者很好的绕开了这些对立的观点.根据In an interview with Time earlier this week,Cohen said that although he and his co﹣author are certainly optimistic about many aspects of the Internet,they're also realistic about the risks and dangers that lie ahead when the next five billion people come online,particularly with respect to personal privacy and state surveillance(监视).可知最后一句中,介绍作者不仅提到了网络的好处,也提到了网络存在的风险和危险.所以答案应该指出作者是持一种中立态度的.故选D.