By the time (1)/ we got our tickets and entered the cinema theatre, (2)/ the show was already begun. (3)/ No error.(4)

Options

A. 1 By the time
B. 2 we got our tickets and entered the cinema theatre,
C. 3 the show was already begun.
D. 4 No error

Answer

C

Explanation

had already begun will replace was already begun because -
Past Perfect Tense will be used here.
Past Perfect Tense is used for showing an action happened in the Past before another event took place.
Look at the example given below:
By the time I got home yesterday, my mother had already cooked dinner.
Hence, the show had already begun is the right usage.