[解析]
W:Jim,why do you look so tired?
M:I didn't sleep well last night.
W:Why?Are you worrying about the coming exam?
M:No.I don't worry about the exam.I'm well prepared for it.
W:Then what's wrong?
M:Three days ago,a young man moved upstairs.He had a party last night.Some of his friends came.They sang and danced.The party lasted deep into the night.
W:Why didn't you go to stop them?
M:I had thought the party would be over before 11 o'clock.I hope he won't have parties too often.
W:Maybe it was his birthday.I don't think he will make a lot of noise every night.
M:I hope so.So have you prepared well for the exam?
W:Sure.