一道初三英语问题!who can help me!
It is said that________umbrella was invented over four thousand years ago by Chinese people~~~
A.a B.an C.theD. /
怎么选?请说明理由谢谢.我只有5分了
不是说。有时候不定冠词也可以表示泛指么？？？B为什么不行？？？