题目

阅读理解The following courses are what you may be interested in to expand your academic knowledge.Stanford OnlineStanford Online is the digital extension of Stanford University. You can attend free courses, browse (浏览) the content library or take the courses for credit after paying. The course instructors teach in real-time, so the options change each semester. Different programs you can pursue include graduate and professional education.Harvard University Online CoursesThey offer free and paid classes with a vast subject range, including art and design, business, and computer science. The site's search features make it easy for you to find classes to fit your schedule. You can browse courses based on your learning plans, such as scheduling classes in two weeks, three months or a year from now.Open Yale CoursesOpen Yale Courses gives you free access to a wide range of Yale University's classes. There's no certificate, degree or course credit option available through the site because it's exclusively a free offering for those who want to expand their academic knowledge. The available classes are classroom recordings and provide the educational material you require for increasing various skills.MIT OpenCourseWareIt provides individuals with free access to over 2,500 of its undergraduate and graduate classes. All courses are free for users, and there's no registration required to view and watch the lesson materials. Additionally, the site makes the video classes easy to download for you to watch offline or to share with your friends, family members or colleagues. （1）  What makes Harvard University Online Courses special? A . The flexibility. B . No charge. C . The diverse content. D . No registration. （2） Which course will you take if you don't want a certificate? A . Stanford Online. B . Harvard University Online Courses. C . Open Yale Courses. D . MIT OpenCourseWare. （3） What do the listed courses have in common? A . They can be learnt offline. B . They're offered by universities. C . They are classroom recordings. D . They are developed by students. 答案： A C B

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