uncle和aunt前面各用a还是an?

uncle和aunt前面各用a还是an? Uncle 和aunt 前面分别加的是a还是an aunt和uncle前面是用a还是an啊 顺便告诉我什么情况下用a什么情况下用an 英语中,名字的首字母是元音字母,前面该用an 还是a比如：Jane has ( )uncle and ( )aunt uncle前面用a,还是an为什么啊 a aunt 还是an aunt ----aunt and -----uncle（an,a） ___(a/an)aunt ___(a/an)uncle Mary has ( )uncle and ( )aunt.A.a,anB.an,aC.an,an eleven和effect前面冠词用a还是an I have（ ）uncle and （ ） aunt.A.an,an B.a,a C.a,an D.an,a 【 】Lily has —uncle and —aunt.A,a;a B,an;an C,an;a D,a;an 一位叔叔是a uncle 还是an uncle 一个叔叔是“a uncle 还是 an uncle? 字母A前面用a还是an 单词 uncle前加a还是an s前面用a还是用an university前面用“a”还是用“an”?