Topic: Gerunds & Participles,

Best Answer Explained in Below-:

In the sentence "I found the movie completely ---------," the blank needs to be filled with a word that appropriately describes the movie in a way that fits the overall structure and meaning of the sentence. The word "engrossing" is the only option that correctly serves as an adjective, meaning that it describes the movie as being very interesting or captivating, which aligns with the context of someone expressing their impression of a film.

Let's analyze the options more closely:

- **A) engrossed**: This is the past participle form and describes a state of being completely absorbed in something, typically used to refer to a person (e.g., “I was engrossed in the movie”). Thus, it does not fit grammatically in this context.

- **B) engross**: This is a verb that means to occupy someone’s attention wholly, but it does not work as an adjective to describe the movie itself.

- **C) engross**: This is simply a repetition of option B and suffers from the same issues.

- **D) engrossing**: This is the present participle form functioning as an adjective, describing something that has the ability to engross. It directly conveys the intended meaning that the movie captivated the viewer's interest.

In conclusion, "engrossing" is the only word that correctly conveys the intended meaning and fits grammatically in the sentence structure, making it the correct choice.