The by-phrase introducing the agent of the action is necessary in a passive sentence.

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• When introducing a company’s products, we should provide a top-level description of the products or services it provides.
• We should focus on the experience of its founders and what inspired them to start the business when introducing the history of a
• Introducing the company performance involves no participating of the employees. ( )
• If you are an outsider to the audience, it’s much better that the person introducing you is（）.
• The company has had a successful year and hopes to maintain its momentum by introducing new products.