[解析]
(1)D 细节理解题.根据第一段"However,he then went on to talk about Mr.Obama in a way which suggested he had no idea of his background at all."可知作者发现朋友撒谎,是因为朋友对此书的深入讨论暴露了他对奥巴马背景的无知,故选D.
(2)B 推理判断题.根据第二段"But I am pleased to say that,unlike 42 percent of people,I have read the book at number one,George Orwell's 1984.I think it's really brilliant.",并结合上文"The report lists ten books,and various authors,which people have lied about reading"可知作者不像42%的人一样假装读过乔治•奥威尔(英国小说家)的《1984》,因此可推测出有42%的人撒谎说读过《1984》,故选B.
(3)D 细节理解题.根据第四段"Asked why they lied,the most common reason was to'impress' someone they were speaking to."可知,大多说人撒谎是想要给别人留下好印象,从而结交更多朋友,故选D.
(4)C 作者态度题.根据第五段"I'll come clean:I do this and am astonished that 58 percent said they had never done so"可知作者对这些人说从未这样做过表示很惊讶,因此可推知作者对这58%的人表示怀疑,故选C.