Respuesta :
The correct answers are:
1) A) To buy. That is the infinitive in the sentence. Infinitive is the form of a verb without inflection often preceded by "to".
2) B) Shutting out their opponent, the other team celebrated in victory. This is the sentence using a participial phrase, which is "Shutting out their opponent".
Participial phrases are created with a verb ending in "ed" or "ing", and they function as adjectives modifying a noun or a pronoun. In our example the participial phrase is modifying the "other team".
3) D) Kicking the ball into the upper left hand corner of the goal, the striker scored the winning goal. The first phrase (in bold) is modifying the noun "striker". Even if we take this phrase out of the sentence we would still have a sentence with a complete thought: "The striker scored the winning goal".
4) B) Printed is a verb form being used as an adjective, appearing immediately before the noun "document".
5) C) All sentences have an infinitive that takes the place of a noun: "to understand", "to hear" "to demonstrate".