[解析]
(1)B.主旨大意题。根据第一段What had gone wrong?Why had the generation gap suddenly appeared?出了什么问题?为什么会突然出现代沟?文章讲述了现代社会的普遍现象代沟问题,分析了代沟问题的主要原因。所以B选项代沟的原因。是本文的主旨,故选B。
(2)D.推理判断题。根据第三段句子,however,the strong wish that parents have for their children is another cause of the disagreement between them.Often,they discover that they have very little in common with each other.然而,父母对孩子的强烈愿望是他们之间产生分歧的另一个原因。他们经常发现彼此之间几乎没有什么共同点。可见现代年轻人与父母几乎没有共同之处。故选D。
(3)B.推理判断题。根据第三段句子Often,however,the strong wish that parents have for their children is another cause of the disagreement between them.然而,父母对子女的强烈愿望往往是他们之间意见分歧的另一个原因。可见代沟的形成与老一代的愿望和要求有关系。故选B。
(4)D.推理判断题。根据最一段句子 Finally,the speed at which changes take place in our society is another cause of the gap between the generations.最后,我们社会变化的速度是造成代沟的另一个原因。所以D选项:社会发展太快了。也是造成代沟的原因。故选D。