The crowd cheered wildly at the sight of Liu Xiang, who was reported _______ the world record
in the 110-meter hurdle race.
a.breaking b.having broken
c.to have broken d.break

请问选哪个，为什么，其他选项是怎么排除的，非常非常感谢大家

The crowd cheered wildly at the sight of Liu Xiang, who was reported _______ the world record
in the 110-meter hurdle race.
a.breaking b.having broken
c.to have broken d.break

选C。

1、先记一个句式：
Sb. be said/reported/believed/thought/known等 + to do。。。
译为：某人据说/据报道/被相信/被认为。。。
如：
He is said to have left.
He is believed to leave soon.

所以选不定式的形式C。

2、to do用to do/to be doing/to have done的哪种形式，取决于不定式的这个动作发生在句子的谓语动作reported等之后/同时/之前。
这道题中break the world record发生在be reported之前，所以用to have done这种完成式。

希望能对你有帮助。