Listen to a short passage three times. When the passage is read for the first time, listen for its general idea. When the passage is read for the second time, fill in the blanks with the exact words you hear. When the passage is read for the third time, check what you have written. B1-U6_3_3_2.mp3: There are many factors that affect a person’s sleep. Stress is the number one cause of short¬ term sleeping difficulties. Stressful situations include school- or job-related 1)____and serious illness in the family. Usually the sleeping problems 2)____ when the stressful situations pass. However, if short-term sleeping problems are not managed properly from the beginning, they can last long and thus 3)_____good health. Unhealthy habits may lead to sleeping problems, too. Drinking coffee or 4)____in the afternoon or evening, exercising close to bedtime, following an irregular morning and nighttime schedule, and working or doing other mentally 5)_____activities right before or after getting into bed can interrupt sleep. Traveling also 6)_____sleep, especially traveling across several time zones. This can 7)_____your biological rhythms and cause sleep disorders such as trouble falling asleep and trouble remaining asleep. Environmental factors such as a room that’s too hot or cold, too noisy or too bright can be an obstacle to sound sleep. Other influences to 8)____are the comfort and size of your bed and the habits of your sleep partner. If you have to sleep beside someone who has different sleeping habits, breathes in a noisy way, or 9)____ other sleeping difficulties, it often becomes your problem too! Having a 24/7 lifestyle can also interrupt regular sleep patterns. Industries are working round the clock to be 10)____ so some people have to work at night; with nonstop automatic communication systems, people are communicating day and night. All these make sleeping at regular times difficult.