Question

_____ is known to us is that the 2012 Olympic Games will take place in London． A．It B．Which

_____ is known to us is that the 2012 Olympic Games will take place in London． A．It B．Which C．As D．What.

Answer 1

D

试题分析：考查主语从句：分析句子成分可知第二个is是主句的谓语，前面都是主语从句，而主语从句缺少主语，填what，句意是：我们都知道的是2012年奥运会将在伦敦举行。选D。 点评：what引导名词性从句时，要在主语从句中做主语，宾语和表语，如果名词性从句不缺成分，一般用that引导。