💡 Detailed Explanation
Translation of Script:
- Narrator: At a friend's house, a man and a woman are talking. Why won't the man drink coffee?
- Woman: Welcome! Would you like some coffee?
- Man: Ah, thank you. But actually, I drank a lot of coffee at home this morning.
- Woman: Oh, really? Then, would you like some green tea instead?
- Man: Yes, please. I love green tea.
- Woman: Okay, please wait a moment.
Explanation of Answer:
- The man declines the coffee because: 'Actually, I drank a lot of coffee at home this morning' (実は、今朝家でコーヒーをたくさん飲んだんです).
- Thus, the reason is that he already had a lot of coffee in the morning. Choice 2 (朝、家でたくさん飲んだから) is correct.