Multiple choice

(A)They seem to enjoy (B) being rung up (C)in all hours of the day and night.(D)No error

  1. (A)

  2. (B)

  3. (C)

  4. (D)

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct preposition to use with 'hours' in this context is 'at', making the phrase 'at all hours of the day and night'. Using 'in' is idiomatically incorrect for specifying points or periods of time like this.