Directions: Select the alternative that will improve the underlined part of the sentence. In case there is no improvement select ‘No improvement’. Priya has been working in this school from June 2017.

Explanation

The correct answer is-since June 2017 . Key Points The present perfect continuous is a verb tense that showsan action or state that either occurred at an indefinite time in the past or began in the past and continued to the present time. The structure is given below: Subject + has/have + been + V 1 + -ing + since/for + object. Since is used for a point of time (1982, last month, etc.) whereas for is used for any duration (4 days, 6 months, etc.). Example: The factory has been working well since 1945. As a point of time i.e. 1917 has been given in the question, 'since' will replace ' from ' in the underlined part . In this way, we are left with the only correct choice as the 4th option. Correct Sentence: Priya has been working in this school since June 2017.