Final answer:
The sentence "I bought a necklace" in Spanish is "Compré un collar."
Step-by-step explanation:
To say "I bought a necklace" in Spanish, you would say "Compré un collar." The verb "compré" is the past tense of the verb "comprar" which means "to buy." The word "un" is used to mean "a" or "one," and "collar" is the Spanish word for "necklace." Together, the sentence translates to "I bought a necklace."
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