.We have a boy in our class.A.English B.American C.Australian D.Japanese
问题描述：
.We have a boy in our class.A.English B.American C.Australian D.Japanese
答
a Japanese boy 选D， 因为其余几个都是元音开头的单词，前面应用an
答
d
其他三个都是元音开头,用an