Her grandmother will arrive there ___ half-past seven in the morning.
at
in
on
none of these
To solve this question, the user needs to understand how to use prepositions of time.
The correct preposition to use when referring to a specific time of the day is "at". Therefore, the correct answer is:
The Answer is: A) at
Option B) "in" is incorrect because it is used to refer to a period of time, such as "in the morning" or "in the afternoon".
Option C) "on" is incorrect because it is used to refer to days or dates, such as "on Monday" or "on June 1st".
Option D) "none of these" is incorrect because option A is the correct answer.