Question

Fill in the blank with a suitable preposition:
Please don’t call me until ______ eight o’clock on Saturday morning.

a. To
b. At
c. By
d. After

Answer 1

Hint: Prepositions are only used to denote the location of a noun, not any other time.

Complete answer:
A preposition is a word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause.
For example, in the sentence ‘The cat is under the table’, the preposition ‘under’ tells us the exact location of the noun ‘the cat’.

Now, let’s look at the available options:
> To - The word ‘to’ is used to refer to an exact time or to denote before a time while giving a period. This does not work with the word ‘until’ already in the sentence. So, this is an incorrect answer.
> At - The word ‘at’ is also used to denote the exact time while giving a period. This also does not work grammatically with ‘until’ already in the sentence. So, this is an incorrect answer.
> By - The word ‘by’ is used to mean at or before a certain time and not after it. It means the same thing as the word ‘until’. It cannot be used in the same sentence. So, this is an incorrect answer.
> After - The word ‘after’ is used to mean in the following time. This works perfectly with the context of the given sentence. It is the required preposition. So, this is the correct answer.

So the correct answer is option D - After

Note: Make sure to go through all the options and choose the preposition that makes the most sense. Also, make sure that the sentence remains grammatically correct.