dialogue: W: How can you be late again? You are always getting up late. M: But this morning, I got up at six o'clock. W: You are not telling the truth! It only takes one hour to go from your home to school. But look at your watch, it's 8:30 now. M: But today the traffic jam took me one and a half hours to get through.
question: Why did the man come late this time?
choice: Because he got up late as usual. Because of the heavy traffic jam. Because he left his home late.
answer: Because of the heavy traffic jam.