Answer:
5: The small chiddren in the audience seemed to enjoy the film.
7: Seven-star hotels are only affrordable to the extremly wealthy people.
Explanation:
Answer:
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It is a gerund. If we added the preposition 'by' like, 'by sprinting the gazelle outran...', we'd know better that prepositions, the case with 'by' for instance, went with gerunds.