Answer:
I read a book about the patriot Crispus Attucks.
Step-by-step explanation:
This sentence contains the preposition "about." Prepositions are used with nouns and pronouns in order to show the relationship between these nouns or pronouns and other words in the sentence. In this case, the preposition wants to show the relationship between the book that was read, and the patriot Crispus Attucks.