Millions of people all over the world use the word OK. In fact, some people say the word is used more often than any other word in the world. OK means all right or acceptable. It expresses agreement or approval.

        ____ Some people say it came from the Native American Indian tribe known as the Choctaw(乔克托语). The Choctaw word “okeh” means the same as the American word “okay”. Experts say early explorers in the American West spoke the Choctaw language in the nineteenth century.

        But many people doubt this. Language expert Allen Walker Read wrote about the word “OK” in reports published in the 1960s. He said the word began being used in the 1830s. ____ Some foreign­born people wrote “all correct” as “o­l­l­k­o­r­r­e­c­t”， and used the letters OK. Other people say a railroad worker named Obadiah Kelly invented the word long ago. They say he put the first letters of his name—O and K—on each object people gave him to send on the train.

        ____ The organization supported Martin Van Buren for president in 1840. They called their group the OK club. The letters were taken from the name of the town where Martin was born—Old Kinderhook, New York.

        Then there is the expression A­OK. It is a space­age expression. It was used in 1961 during the flight of astronaut Alan Shepard. He was the first American to be launched into space. His flight ended when his spacecraft landed in the ocean, as planned. Shepard reported, “Everything is A ­OK.” ____ One story says it was first used during the early days of the telephone to tell an operator that a message had been received.

        There are also funny ways to say okay. ____ These expressions were first used in the 1930s. Today, a character on the American television series The Simpsons says it another way. He says okely­doke.

A．Some people say okey­dokey or okey­doke.

B．Still others say a political organization invented the word.

C．Therefore, it has become popular in that area from then on.

D．But many experts don't agree on what the expression means.

E．Still, language experts do not agree about where the word came from.

F．It was a short way of writing a different spelling of the word “all correct”．

G．However, some experts say the expression did not begin with the space age.

阅读下面的文字，回答下列问题

读网，更要读书

    ①这是一个网络时代，读网已经成了很多人的习惯。网络固然给生活带来种种方便与趣味，然而，如果将大量的时间倾注在虚拟空间，内心反而容易浮躁不安，难以沉静。

    ②与眼花缭乱的社交网络相比，读书不仅能够使人远离纷扰的环境，保持内一心的沉静，而且可以使人感受世界，体悟人生，获得启迪。

    ③因此，读网，更要读书。

    ④一谈起读书，我们总是抱怨太忙没时间，但偏偏又能挤出时间刷微博、看视频。读网是轻松的，可以一目十行，脑子里过一遍，不一定留下痕迹；读书是深沉的，要用心用脑去理解、体会、感悟。所以，不是时间不够用，而是我们不愿意把时间用在“费脑子”的事情上。

    ⑤拒绝喧嚣的社交网络，腾出更多的时间读书，是需要勇气的。去年，“网红”埃森娜在YouTube上发布了最后一条视频《为什么我要放弃社交媒体》，并彻底删除了自己的账号以及275万个订阅者。为什么这么做？埃森娜认为，社交媒体是不真实的，制作出的形象、编辑过的生活，虽然能获得关注，但也丧失了真正的自我。

    ⑥我们生活在这个被屏幕统治的时代，时空被网络割裂，“碎片化”成为生活常态。诚然，从网络获取信息很重要，彻底逃离网络几乎不可能。但是，面对网络，我们可以做出有益的选择。让我们放弃那些八卦消息和无聊视频，把更多的时间留给读书吧！

进化与适应是重要的生命观念之一，下列相关叙述中，不正确的是（   ）