เสียงที่ใช้ร่วมกัน

[narrator] EXAM RULES AND REGULATIONS [narrator] 1. Talking, communication, and copying are strictly prohibited. [narrator] 2. Leaving your seat is prohibited (unless you raise your hand and receive permission). If you have any questions, raise your hand to signal the invigilator. [narrator] 3. Do not open the exam paper until instructed to do so.