听力原文:W: Hey, why's your foot bandaged up? What happened? M: I was going to be late for work this morning, so I had to hurry. I was trying to get down the stairs quickly and I slipped and twisted my ankle. W: Ouch! M: Yeak. The reach I didn't wake up on time was because the batteries in my alarm clock ran out last night. Why did the man wake up late this morning?