问题
选择题
_____ is known to us all is _____ the theme of Shanghai Expo is “Better city, better life”.
A．It; what
B．It; that
C．What; that
D．What; what
答案
答案：C
考查名词性从句，第一空填what引导主语从句，在主语从句中what做主语，第二空填that，引导表语从句，表语从句是完整的，that不做成分，句意是：我们都知道的是上海世博会的主题是城市，让生活更美好