【正文】
so help delay the 68(nighttime) drop in your body’s temperature. The 69(benefits) of exercise are especially important for older people, 70(since) exercise has been shown to increase the amount of sleep senior adults get in a night and reduce the time it takes to fall asleep. But be sure you finish exercising at least 4 hours before bedtimeworking out later than that could leave you too excited to fall asleep easily. 61. a. conscious b. peaceful c. effective d. refreshed 62. a. physically b. mentally c. emotionally d. regularly 63. a. made b. done c. functioned d. conducted 64. a. night’s sleep b. dreaming sleep c. deep sleep d. REM 65. a. Exercise b. Dreams c. Resea