问题描述：
定冠词与不定冠词表类别时的区别是什么
（2008·杭州）It is said that _____ umbrella was invented over four thousand years ago by Chinese people.
A.a B.an C.The D.不填
The,这里表类别,为什么不用an呢?
an和the 表类别时有什么区别?
（2008·杭州）It is said that _____ umbrella was invented over four thousand years ago by Chinese people.
A.a B.an C.The D.不填
The,这里表类别,为什么不用an呢?
an和the 表类别时有什么区别?
问题解答：
我来补答展开全文阅读