Multiple choice

Directions: Choose the most suitable word from the following given options and fill in the blanks: It is I who _________responsible for this mistake.

  1. is

  2. has been

  3. am

  4. has

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

In the construction 'It is I who...' the verb must agree with the subject 'I'. The subject-verb agreement rule requires 'I am', not 'I is', 'I has been', or 'I has'. This is a formal structure emphasizing the subject. Options A, B, and D show incorrect subject-verb agreement with first person singular 'I'.