Choose the best Spanish equivalent to the phrase. He is the first dentist to work here.

In Spanish, primero shortens to primer when it comes directly before a masculine singular noun, so “the first dentist” is “el primer dentista.” To say he is the first one to do something, use “en” before the infinitive: “en trabajar.” Therefore, “Es el primer dentista en trabajar aquí” is the correct equivalent.

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