1. The sound of the car alarm going off echoed through the neighborhood, "aa, aa, aa."
2. The teacher asked the student to recite the alphabet, starting with "aa."
3. I couldn't help but let out an "aa" of surprise when I saw the unexpected gift.
4. The baby let out a loud "aa" when the cold water touched her skin.
5. The singer hit a high note that made the audience gasp and say "aa."
6. The hiker let out an "aa" of relief when he finally reached the mountain peak.
7. The cat let out a soft "aa" as she stretched out in the sun.
8. The child pretended to be a superhero and shouted "aa" as he jumped off the couch.
9. The fireworks display lit up the sky with bursts of color and loud "aa" sounds.
10. The doctor instructed the patient to open his mouth and say "aa" during the examination.