Select the most appropriate option that can substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No substitution required’.
By the time his friends woke up, he had already begun his journey
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. No substitution required.
By the time his friends woke up, he had already begun his journey
When to use past participle such as 'begun'.
The past participle is generally used with an auxiliary (or helping) verb—has, have, or had.
Hence, No substitution required is the correct answer.