a underwear 还是 AN UNDERWEAR?

a underwear 还是 AN UNDERWEAR? underwear 关于a/an填空的具体题目( )united action 这道题请问应该填A还是AN呢?我不明白为什么un发的音好像是元音答案却填a,其他的un的基本都是... a piece of shirt a piece of underwear对吗 underwear of underwear是什么意思 联合国是the UN 还是UN? 英语翻译But the female form is expanding at such a pace that even they are now not generous enough for our largest ladies.An N cup size has been introduced – by no less than the Queen’s underwear supplier. a还是an uniform 用a还是an 要用a还是an? 是a还是an 看到一个例句其中有a UN tree一颗联合国树为什么是a 不是an Σun读作西格玛un还是西格玛 underwear 什么意思 UNDERWEAR是什么意思啊 box underwear是什么意思 guess underwear是什么意思