题目内容：

my boyfriend used yo be ___unreasonable person,but now has turned__man everyone likes to work with.
A an:/ B an:a C an:the
the answer is A,tell me why?thank you

优质解答

选A.unreasonable次词为元音音素开头,要用an.turn表示改变之意.其后不加冠词.要是把turn改为become就可以加冠词a了.