Select the most appropriate option that can substitute the highlighted words in the given sentence.
He has been writing most articles and has given presentations on his research.

Correct option is B

The correct substitution of the highlighted words is (b) has written several articles.
Explanation: The phrase “has been writing most articles” is incorrect as it implies a continuous action, but the next part "has given presentations" shows completion. Thus, present perfect "has written" is the correct form to maintain tense consistency.
Grammatical rule used: Use Present Perfect (has/have + past participle) to show completed actions relevant to the present.
Example: She has written five books.
�� Information Booster: Use Present Perfect Continuous (has been + V1+ing) for actions continuing up to the present moment.