Question

Books open--
vast new world to us
the a an some​

Answer 1

Books open "a"vast new world to us

Explanation:

• There are two articles in the English grammar that are "the and a/an".

• "the" is considered as a definite article and "a/an" is considered as an indefinite article.

• Articles are used to define the specificity of a noun.

• Article "the" is used to refer to the specific nouns. It can be used for singular as well as plural nouns.

• "a/an" article is used for the unspecific nouns. It is used for singular nouns.