Answer: buena
Explanation:
When you speak spanish putting the word buena in the end sounds better.
Obviously, the answer below me is incorrect because it can't be 'boca la boca,' - that wouldn't mean a thing.
The correct answer is in fact abra. Abrir means 'to open,' and here you need to use its subjunctive form for third person singular, which is abra. The entire sentence means - The doctor asked the patient to open his mouth.
