第二部分      语言知识及应用（共两节，满分35分）
第一节   完形填空（共10小题；每小题2分，满分20分）
阅读下面短文，掌握其大意，然后从21—30各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
Many people find that regular physical activity gives them an unexpected benefit. They sleep better and wake up feeling more  21           , in part due to increased amounts of deep sleep. Deep sleep may play a role in the body restoring（修复） itself  22          , as opposed to REM （rapid eye movement） or dreaming sleep. Researchers have found that physical exercise, especially  23           in the afternoon or early morning, produces more  24          early in the night.
25          can also help you get a better night's sleep in a number of indirect ways. The relaxation and tiredness  26          by exercise can improve sleep.
Exercise encourages weight loss and also may  27           depression. Exercising later in the day can also help delay the   28          drop in your body's temperature. The  29           of exercise are especially important for older people,  30              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 bedtime — working out later than that could leave you too excited to fall asleep easily.
21.A. conscious              B. peaceful                C. effective               D. refreshed
22.A. physically             B. mentally               C. emotionally              D. regularly
23.A. made                    B. done                            C. functioned         D. conducted
24.A. night's sleep   B. dreaming sleep             C. deep sleep         D. REM
25.A. Exercise               B. Dreams                 C. Researchers              D. Doctors
26.A. recovered             B. strengthened          C. caused               D. reduced
27.A .increase         B. relieve                         C. release                     D. arouse
28.A. nighttime              B. daytime                C. dinnertime         D. lifetime
29.A. disadvantages   B. benefits                        C. ways                        D. places
30.A. yet                B. if                                C. when                       D. since