Question

Fill in the blank with the most appropriate word:
I'll phone you ________ about 3:00.

• A. at
• B. in
• C. on
• D. no preposition
  

Answer 1

Answer: (A)

at

Answer : A

Prepositions are words that indicate relationships with the other words in the sentence. Prepositions of time are used to denote time in a sentence.

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

• at : to refer to an exact time of the day, also used along with "night"
• in : to refer to a period of time, usually years / months / seasons / morning / afternoon / evening
• on : to refer to days / period of time

In the question, a specific / exact period of time has been mentioned ("3:00"). Therefore, the suitable preposition here is "at".

Thus, the correct complete sentence is:

I'll phone you AT about 3:00.