Question

ill in the blank with the most appropriate word:
I met my classmates’ _____________ the party.
a) In
b) Since
c) On
d) At

Answer 1

Hint: Here we need to use a preposition that is used to refer to an exact location or event where something is situated or has happened or will happen etc.

Complete answer:
 Prepositions are words that are used to show the relation of a noun to another element (noun/adjective/verb) in the sentence.
In the sentence, we can see that the speaker met his classmate at a specific location where the party was happening. So, to complete the sentence correctly, let us look into the prepositions given to us as options and find the correct solution.
Option (a) – in the preposition ‘in’ is used to indicate that something is inside something. For example: are you in the room?
Option (b) – since the preposition ‘since’ is used to indicate the period after a specified time in the past. For example: since 1990, my parents have lived here.
Option (c) – on: the preposition ‘on’ is used to refer to the placement of something over something or on top (on the surface) of something. For example the cat is sitting on the table.
Option (d) – at the preposition ‘at’ is used to refer to an exact location/ event where something is situated or happened or is happening or will happen. For example I met them at the party.
So, as we can see from the above explanation the correct solution would be option (d), i.e. at. Thus, the complete sentence would be – “I met my classmates at the party”.

Note:
In, an on refer to something inside or over (on top or surface) of something respectively. Hence, these two have no use here. So, you can eliminate them as options.