Question

Fill in the blank with a suitable article:

That evening, ___ policeman knocked on my door. (You don't know this policeman.)

• A. a
• B. an
• C. the
• D. this

Answer 1

The correct option is A a

When a noun's identity is not known, it's a non-specific noun, hence an indefinite article is used. Indefinite articles like 'a' or 'an' are used when the noun is not specific (indefinite). The noun 'policeman' is non-specific hence the article 'a' is used because 'policeman' begins with the consonant 'p'. Option B is incorrect because it modifies nouns that begin with a vowel, and 'policeman' does not begin with a vowel. The definite article 'the' is used for nouns that are particular or known to the speaker and listener. Option C is incorrect because the noun is not specific and his identity is unknown. Option D is incorrect because the demonstrative 'this' is used for nouns that have been mentioned before since it's not mentioned before, 'this' is not the correct answer.