Question

Call me ........................ an hour.

• A. on
• B. from
• C. in
• D. of

Hint:

For future time, use 'in' to denote the end of a period (e.g., "The meeting will start in ten minutes"). Use 'at' for a specific clock time (e.g., "The meeting will start at 10 o'clock").

Answer 1

The Correct Option is C

Step 1: Analyze the context of the sentence. It is a request to be called after a certain period of time has passed.
Step 2: Recall the prepositions of time. 'In' is used to specify a duration of time at the end of which an action will take place. 'At' specifies a precise time. 'On' is used for days and dates.
Step 3: Apply the correct preposition. "In an hour" means at the end of the one-hour period. Therefore, 'in' is the correct choice.