Question

Fill in the blank with the most appropriate word.
We can call __________ Mary at her office at 10 tomorrow.
A) In
B) Off
C) On
D) Over

Answer 1

Hint: Prepositions are used in the sentences or in the clauses to show directions, time, place, location, or for the introduction of an object. For example: among, around, at, before, between, by and etc.

Complete answer:
Let us analyze the given options:
Option A) In – Preposition ‘in’ is used for describing months, years, centuries and long periods. For example: in May, in summer, in India, in 1990 and etc. The preposition ‘in’ cannot be used in the sentence ‘We can call __________ Mary at her office at 10 tomorrow’ because the use of ‘in’ will make the sentence grammatically incorrect. Therefore, this is an incorrect answer.
Option B) Off – preposition ‘off’ Is used to indicate disconnection from a person, place or object. Off is generally used after verbs, phrasal verbs. For example: call off, put off, go off, run off, etc. The use of the preposition ‘off’ cannot be used in the blank because the use of the preposition ‘off’ will make the sentence grammatically incorrect. Therefore, this is an incorrect answer.
Option C) On – preposition ‘on’ is used for days and dates and also used when it is used to indicate a visit. However, we can call Mary at her office at 10 tomorrow is the correct sentence because the preposition ‘on’ is being used in the blank. Therefore, this is the correct answer.
Option D) Over – preposition ‘over’ is used when crossing one side to the other side that refers to something at a higher position than something else. Therefore, the use of ‘over’ in the blank will make the sentence grammatically incorrect. Thus, this is an incorrect answer.

Thus the correct answer is option ‘C’ i.e, We can call Mary at her office at 10 tomorrow.

Note: There are certain rules of prepositions and based on these rules we get a better understanding of the use of prepositions in the sentence.
1) Preposition must be placed before the noun or pronoun.
2) Prepositions are never used at the end of the sentence.
3) Prepositions in grammar are highly idiomatic and must have an object.
4) Do not confuse the preposition ‘in’ and ‘into’. For example: in is used in indicating the location (Look in the kitchen) and into is used for expressing motion (The cat jumped into the pond).