A 
    
        
            | Courses of Harvard University 2022-2023 | 
        
            | An Introduction to Tai Chi This course bangs you how-to videos that teach   20 different moves. Although this centuries-old Chinese martial art may sound   mysterious, recent studies show that it can help to strengthen your heart,   lower blood pressure, and so on. Time: January 17, 2022—January 17, 2023 Course fees: Free | 
        
            | The Business of China China will become the world’s largest economy   by 2030. We explore the drivers of China’s growth, including traditional   family firms. Internet start-ups and state-owned enterprises. This course   offers business leaders the knowledge and skills needed to run their   companies. Time: January 25—May 15, 2022 Course fees: $1,880 | 
        
            | Shakespeare’s Life and Works This course will introduce different kinds of   literary analysis that you can use when reading Shakespeare. With short   videos filmed in England and topics like different approaches to textual   interpretation, you will learn how to unlock the meaning of Shakespeare’s   plays. Time: March 30, 2022—March 29, 2023 Course fees: Free (add an official certificate   for $99) | 
        
            | The Walkable City J. Speck, author of the best-selling Walkable   City, for a comprehensive   two-day course on the most effective techniques and tools for reshaping   places in support of walking, biking, and transport. The course will focus in   great depth on the following strategies for making better places: Put Cars in   Their Place, Welcome Bikes and so on. Time: June 13—June 14, 2022 Course fees: $1, 600 | 
        
            | Create an account, choose your course and then   register. The courses are available to all from every corner of the world. | 
    
 
21. If you want to keep fit,which course will you choose?
A.The Business of China.                                 B.Shakespeare’s Life and Works.
C.An Introduction to Tai Chi.                            D.The Walkable City.
22. What is special about the course The Business of China?
A.It is the only one related to China.          B.It is intended for business leaders.
C.It is about how to enjoy work.                       D.It is taught by an economist.
23. What do the four courses have in common?
A.Requiring signing up.                     B.Lasting for more than a year.
C.Charging high course fees.                            D.Being open to students only.