Choose the most appropriate answer and fill in the blank. ______ in the…

Solution:

Correct answer: having worked.

Why this is correct:

• The phrase "having worked" is the perfect participle (having + past participle). It indicates an action completed before the action in the main clause.

• In this sentence it shows prior experience that explains the result: because he had worked at the company for many years, he knew everyone and everything.

• Example: Having finished dinner, the children were allowed to play.

Why the other choices are wrong:

• "having working" is incorrect because "having" must be followed by a past participle, not the -ing form.

• "worked been" is ungrammatical due to incorrect word order and does not form a valid participial phrase.

• "Been worked" is not the appropriate structure here; "been" with a past participle is used in passive perfect constructions, which is not required in this sentence.

Correct sentence: Having worked in the company for many years, he knew everyone and everything.