Passage 3:If you have trouble getting a good night’s sleep, don’t have an alcoholic drink before bedtime. While alcohol can certainly knock you out, it also damages the quality of sleep you’ll get. That’s because chemically interferes with dreaming, an important part of restful sleep. Also, avoid beverages and foods that contain caffeine, such as coffee, most teas, colas, and chocolate. Caffeine can stimulate you, making sleep difficult or impossible. A better before-bed choice is a milk, which contains a mild, sleep-inducing type of protein. Another piece of good advice is to exercise during the day; this can leave you tuckered out enough at night to fall promptly and soundly asleep. But do avoid exercise right before bedtime, as its immediate effects are more stimulating than relaxing. Last, try to get up at about the same time every day; this practice will help your body establish a solid sleep and wake cycle. Varying your hours too much an confuse your body’s “inner clock.”
选项：

A:People have trouble getting a good night’s sleep;
B:Having an alcoholic drink before bedtime helps sleep;
C:There are several ways to get a good night’s sleep;
D:The better milk you choose, the better your sleep will be