Complete the sentence with suitable alternatives from the options given below.
Sumit is obedient, someone else ________ done it.
Answer & explanation
Correct answer: option 1
The correct option to complete the sentence is must have. The completed sentence is:
Sumit is obedient, someone else must have done it.
The verb must have indicates that the action was done in the past and there is a high degree of probability that it was done by someone other than Sumit.