💡 Detailed Explanation
Translation of Script:
- Narrator: A man and a woman are talking. Why did the man miss school yesterday?
- Woman: Ken-san, you were absent yesterday, right? Did you catch a cold?
- Man: No, I didn't have a cold or a headache. Actually, my tooth started to hurt badly in the morning.
- Woman: Oh, a toothache? That sounds tough.
- Man: Yes, so I went to the dentist's hospital yesterday.
- Woman: I see. Are you okay now?
- Man: Yes, I am fine today. Thank you.
Explanation of Answer:
- The woman asks if the man was absent due to a cold ('風邪ですか').
- The man denies a cold or headache ('頭も痛くなかった'). He explicitly says: 'Actually, my tooth started to hurt badly in the morning... I went to the dentist's hospital' ('朝から歯がとても痛くなったんです... 歯医者の病院に行きました').
- Therefore, the reason for his absence was a toothache. Choice 2 (歯が痛かったから) is correct.