One of the longest rivers in the world is Changjiang River .
One of tall athletes is Yaoming.
One of beautiful cities in China is Beijing.
One of famous Chinese in Hollywood is Bruce Lee.
One of popular instruments is piano.还确少主语呢one of +adj+n这个就是主语。。汗。。。前面的one of +adj 都是用来修饰 n 的，提炼出来主语是 n ，谓语、宾语在后面。能不能那样造 主语+be+one of。。。。。这个更简单Changjiang River is one of the longest rivers in the world.Bruce Lee is one of famous Chinese in Hollywood.其它句子依葫芦画瓢，应该能看懂吧。嗯嗯，哈哈，谢谢啊像 in the world , in China, 这些可以自己加，属于定语，相当于限定比较的范围。加的位置和上面类似。