It's said that______ umbrella was invented over four thousand years ago by Chinese people.A.a B.an C.the D.\但是我绝得A也可以选呀,

It's said that______ umbrella was invented over four thousand years ago by Chinese people.A.a B.an C.the D.\但是我绝得A也可以选呀,
It's said that______ umbrella was invented over four thousand years ago by Chinese people.
A.a B.an C.the D.\
但是我绝得A也可以选呀,

It's said that______ umbrella was invented over four thousand years ago by Chinese people.A.a B.an C.the D.\但是我绝得A也可以选呀,
the 用在单数可数名词前表示一类人或事物,本题加umbrella 前,表示伞这种物品,要特指
又如在 The horse is a useful animal.中,The horse 指马这种生物.
a不定冠词在句子中最大的语法功能是：用在可数名词的单数形式前表示泛指--表明一类人或事物区别于它类.此句不是泛指,也不能说具有一个的意思
例：I am a Chinese.我是(一个)中国人.
This is a book.这是（一本）书.
注意,前面的that是宾语从句的引导词,不是那个之意

the + 名词 表示这种物品，也可以用复数形式表示种类

umbrella u开头是元音字母如果是A应该是an
It's said that后是从句泛指就是雨伞

这里的umbrella 是泛指所有的雨伞，而不是只有指那一把雨伞。所以应该选C

A一定是错的.因为在umbrella前如果一定要选也应该选B.
但是,the umbrella 在此表示的并非是任何的一把伞,而是种类

这里伞不是指一把伞而是指伞这样东西

That 是一种句型呀，