问题
选择题
_________ is known to us all is that the 2012 Olympic Games will take place in London.
A．As
B．What
C．That
D．It
答案
答案：B
考查名词性从句。句中what引导主语从句，在从句中作主语，故选B。
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_________ is known to us all is that the 2012 Olympic Games will take place in London.
A．As
B．What
C．That
D．It
答案：B
考查名词性从句。句中what引导主语从句，在从句中作主语，故选B。