问题补充:
excited us Chinese greatly that Liu Xiang,a Chinese,won the Olympic champion of the 110 meter hurdle race
A. What
B. That
C. It
D. As
答案:
A. What
B. That
(答案→)C. It
D. As
解析:本题如选A项,其句型应为:What excited us Chinese greatly was that...。如选D项,应改为:As excited us Chinese greatly,Liu Xiang,...。B项中的that只能引导主语从句,不在句中作任何成分。如选B项,句中则缺少主语。本题中It为形主语,that引导的从句为真正的主语。