[a]的闭音节单词：
[ɔ]的闭音节单词：clock ,box,fox,lock,stop,tock,hot,not,off,of,long,job,soft
[ɜ]的闭音节单词：
[i ]的闭音节单词：big ,pig ,it ,fish,this,is ,fit ,his,milk,.sit,hit,
[u]的闭音节单词：push,put,pull