用英语说几个想象中的世界之最

The world's most...=世界之最

世界最好看的建筑是中国古老的建筑
The world's most beautiful construction is the ancient Chinese buildings

世界最好普遍说的语言是中文
The world's most spoken language is Chinese (mandarin)

等等

you are the most funny guy of the world?

Changjiang 长江
Mount Qomolangma 珠穆朗玛峰
Chongqing 重庆