Question

fill in the blank by suitable article This was completed in ---------- whole year.

Answer 1

This was completed in a whole year.

Answer 2

$\textbf{\large{Answer -}}$

This was completed in $\textbf{a}$ whole year.

Here we use the article 'a'.

What is article ?

It is a word which is used with noun to provide specifical grammatical definiteness to a noun.

Example, a , an , the