There are--great number of stars in the sky but no one can tell--number of them 横线上填什么?

There are--great number of stars in the sky but no one can tell--number of them 横线上填什么?
There are--great number of stars in the sky but no one can tell--number of them 横线上填什么?

There are--great number of stars in the sky but no one can tell--number of them 横线上填什么?
a,the