把下列词语补充完整。
昏昏____ 声嘶____
西楚霸王项羽认为自己力能举鼎,有万夫不挡之勇,不听文臣武将的劝谏,结果是四面楚歌,垓下大败,乌江自刎。项羽的失败启示我们 ()
______ Mary ______ John has been to China before, but they know a lot about it.