at
on
in
of
Answer is Right!
Answer is Wrong!
The correct answer is: A. at
The word “at” is used to indicate a specific time. In this case, the speaker is saying that they will call the listener at six o’clock.
The word “on” is used to indicate a specific day or date. For example, you might say “I’ll see you on Monday.”
The word “in” is used to indicate a specific period of time. For example, you might say “I’ll be there in an hour.”
The word “of” is used to indicate a specific part of something. For example, you might say “I’m going to the store to buy some milk.”
In this case, the speaker is not indicating a specific day, date, or period of time. They are simply saying that they will call the listener at six o’clock. Therefore, the correct answer is “at.”