【正文】
25 1016. A)Summer vacation. B)The housing office. C)Resident advisers. D)Checkout procedures.17. A)Register for summer school. B)Repair holes in room walls.C)Remove personal property. D)Call the housing office.18. A)Their summer addresses. B)Any damage to their rooms. C)When the plan to leave. D)Questions for the housing office.19. A)Your heart rate is lowered. B)It bees harder for you to relax.C)You bee too tired to sleep. D)Your sleeping rhythms are disrupted.20. A)Failure to rest during the day. B)Lack of sleep on weekends. C)Vigorous exercise in the evening. D)Eating cheese before going to bed.21.