问题
选择题
After five years of preparation，Shanghai presented the world ______ many said was the greatest Special Olympics.
A．when
B．what
C．where
D．which
答案
答案：B
此题中，present接了双宾语，一个是the world，另一个是what引导的宾语从句。what引导的宾语从句又是一个主从复合句，said的宾语从句中缺少主语，因此只有what能引导从句。