Fill in the blanks with the correct set of Determiners from the options given : ('X' indicates No determiner)

Vasudev recently became ________ trustee of his company, being appointed  ________ Director of the Board. He has been ________ expert all through his career and his ________ experience will benefit all.

a, the, an, X

Here's why:

• First blank: "a" is used because "trustee" is a general role not a specific one at the company.
• Second blank: "the" is used because "Director of the Board" is a specific and unique position within the company.
• Third blank: "an" is used because "expert" is a non-countable noun and we're emphasizing his general expertise, not a specific kind.
• Fourth blank: "X" is used because we don't need any determiner before "experience" as it's directly modifying the pronoun "his."