听力原文:M: How long does it take you to drive home when there is not much traffic? W: Only 25 minutes, but if I can't leave my office before 5:30 p.m., it sometimes takes me 50 minutes. Q: How long does it take the woman to drive home when it isn't rush hour? (17) A.20 minutes. B.50 minutes. C.25 minutes. D.55 minutes.