orange前加an还是加a

orange前加an还是加a orange前加a,那orange前有形容词,加a还是an?例如a big orange,还是an big orange? orange shirt前面加什么?加an还是a? MP4前加a还是an不定冠词 MP4前加an,a还是the exciting前加a还是an 单词 uncle前加a还是an eraser前加a还是an? black eraser前加an 还是a Asian前加an还是a American前加a还是an? 11前加a还是an information前加a还是an banana前加a还是an 英语名词 加auseful前加a还是an 如何快速判断名词前加an 还是加a uncle前加a,an? hamburger前加a,an