2．Zhongdian was called Shangri­la officially ________. 　　　　　　　　　　　　　　　　　　 A．before 1933 B．in 1933 C．before 1997 D．after 1997 3．Why do the lakes in Shangri­la look like diamonds? A．Because they are surrounded by grasslands. B．Because they are covered by grasslands. C．Because there are some towers on the grasslands. D．Because people like talking about them.