Question

Fill in the blank with a suitable preposition:
Listen! I think there is someone _________ the front door.

• A. On
• B. At
• C. In
• D. With

Answer 1

Answer: (B)

At

Answer : B

Prepositions are words that indicate relationships with the other words in the sentence. Prepositions of place are used to refer to a place, usually to denote the location of something or someone.

Let's look at the usage of various alternatives in the option as preposition of place:

• at : to refer to an exact place where something is situated / event
• on : to refer to placement of something attached / adjacent to something else; to refer to something displayed on something else
• with : means "accompanied by"; or "in relation to"
• in : means "inside"

In the sentence, as a reference to a specific location , i.e. the front door. Therefore, the suitable preposition here is "at".

Thus, the correct complete sentence is:

Listen! I think there is someone AT the front door.