Translation of "11th" in Chinese

In China, the 11th of November is Singles Day.

在中国十一月十一号是光棍节。

The World Cup is going to start on the 11th.

世界杯 11 号就要开始了。

Shocked by the events of September 11th, politicians all over the world condemned the terrorists for their reprehensible deed.

911事件让世人震惊，全球所有的政治家都一致谴责恐怖分子的这一应受人斥责的行径。