20．He has millions of students from all around the world．They listen to his classes online but never see his face on the screen．Salman Khan，39，from the US，is the founder of the learning website Khan Academy．
Unlike other online courses that film teachers giving classes，Khan's videos only use his voice and a digital blackboard for writing．He says he doesn't want a human face to distract students．Khan also makes his classes as short as 10to 15minutes so students don't lose interest．They can also earn （获得） points from taking these classes．
The courses are translated into more than 36different languages including Chinese．About 80teachers from the world's top universities are now also teaching on the website．But all this started nine years ago with just one man-Salman Khan．υThese kinds of special courses make Khan Academy one of the world's most popular online education websites．
In 2006，Khan made homemade videos to help his seventh grade cousin with math．He posted the videos online and got thousands of views．This encouraged Khan to make more videos and create his own website Khan Academy．
As a Bangladeshi-American （孟加拉裔美国人），Khan understands that many kids，especially those in developing countries，cannot get a good education．He himself has three degrees （学位） from Massachusetts Institute of Technology and one from Harvard．He wants to use his knowledge to help more people．Thus，his courses are all offered for free．"Our mission （任务） is to provide a free，world-class education for anyone，anywhere，"he said．
Khan's website has not only become very popular worldwide but has also won a lot of respect．Even Bill Gates，the founder of Microsoft，is one of his fans．Gates donated over $1.5million （9.6million yuan） to support Khan and named him the"teacher to the world"．
28．From Paragraphs 1-2，we learn thatB．
A．Khan Academy is only for people in the US
B．Khan Academy is an educational website
C．Khan's courses film teachers giving classes
D．there is a 10to 15minute break between Khan's classes
29．What does the underlined word"distract"mean in Paragraph 2？C
A．麻烦 B．吸引 C．使分心 D．使烦恼
30．How many languages are the courses translated into？A
A.36 B.80 C.9 D.1
31．Which of the following is NOT true？A
A．Khan's cousin came up with the idea for Khan Academy．
B．Khan knows about the educational situation in developing countries．
C．People don't have to pay for Khan's courses．
D．Bill Gates named Khan the"teacher to the world"．
分析 文章介绍了Salman Khan创办在线学习网站Khan Academy的过程，以及该网站的一些情况．
解答 28-31 BCAA
28．B 主旨大意题．通过第一、二段的介绍可知，the learning website Khan Academy是一个学习的网站，而且学生只能听到声音，use his voice and a digital blackboard 还有一个数码黑板，故答案为B．
29．C 猜测词意题．根据第二段Khan's videos only use his voice and a digital blackboard for writing可知，在网站上学生只能听到声音看不到老师的脸，因为不想让学生分心，所以distract此处使…分心，故答案为C．
30．A细节题．根据第三段开头The courses are translated into more than 36different languages including Chinese可知，该课程被翻译成36种不同的语言，包括汉语，故答案为A．
31．A细节题．In 2006，Khan made homemade videos to help his seventh grade cousin with math根据这句话可知，在2006年Khan自己把视频贴到网上引起了大家的关注，从而引发了创造网站的想法，故A说法错误．Khan understands that many kids，especially those in developing countries，cannot get a good education．看出B正确；his courses are all offered for free得出C正确；Even Bill Gates named him the"teacher to the world"．根据这句话D正确．
点评 在阅读时，首先看题目要求我们理解什么细节，找出关键词，然后以此为线索，运用寻读的技巧迅速在文章里找出相应的段落、句子或短语．认真比较选项和文中细节的区别，在正确理解细节的前提下，确定最佳答案
