用a/an/the回答My mother used to be_engineer,but niw she is _businesswoman

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用a/an/the回答My mother used to be_engineer,but niw she is _businesswoman

第一个填an,第二个填a.决定填a或an关键取决于所修饰名词的英标,如果单词是以元音英标开头,如engineer是以元音[e]开头的,则用an.相反如果单词是以辅音开头的,如businessman以辅音[b]开头的,则用a.而zhe和这两者的区别...