บทสนทนานี้ใช้ตอบคำถามข้อที่13-15
Manop: What are those policemen doing?
Prapan: They're stopping motorcyclists.
Manop: ___13___
Prapan: l guess those cyclists are ___14___ .
Manop: Yes. l think you're right. Many of them aren't wearing helmets.
Prapan: ___15___ Now l understand why we need policemen here.
Choose the best answer.