Final answer:
The best Spanish word to complete the sentence would be 'nuestros'.
Step-by-step explanation:
The best Spanish word to complete the sentence 'A mis amigos les gusta tomar (their) refrescos con limón' would be 'nuestros'.
In this sentence, 'A mis amigos les gusta tomar' means 'My friends like to drink', and 'nuestros' means 'our' in Spanish. So, the complete sentence would be 'A mis amigos les gusta tomar nuestros refrescos con limón', which means 'My friends like to drink our sodas with lemon' in English.
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