Section B

　　Directions: In this section, you will hear two passages. At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.

　　Passage One

　　While we are supposed to go to bed tired and wake up energized, ever notice it’s often the other way around? Instead, you are wide awake when you lie down at night and wake up exhausted. Sound familiar? Late-night technology may be to blame. And it could be harming your personal and professional life.

　　There is certainly a lot of technology around us in this modern era, and we’re bringing it to the bedroom, which can have negative impact on a good sleep. There are some reasons why you shouldn’t bring your tech to bed. And you can learn to manage technology to prepare yourself for better sleep.

　　Theoretically speaking, to fall asleep, your body needs an increase in levels of melatonin. Problem is, a backlit device decreases melatonin production. Smartphones and tablets can emit what we call blue light, which can suppress natural hormones, and may have some negative circadian rhythm effects.

　　Circadian rhythms act as an internal clock, keeping us on a daily cycle of sleeping, waking, eating and other behaviors. But circadian rhythms respond to changes in light and darkness in one’s environment. So, when the blue light is emitted and melatonin is suppressed, we’re not able to get to sleep at a proper time, neither are we able to get a good sleep.

　　Even though many phones, tablets and e-readers today have an “anti-blue light,” “blue light filter,” or Night Shift option, data suggests these features may not be that effective in reducing blue light and 4 related negative effects.

　　Questions 9 to 11 are based on the passage you have just heard.

　　9. What may late-night technology use result in?

　　10. In which aspect does the blue light emitted by mobile devices affect our sleep?

　　11. What’s said of the “blue light filter” option on phones or tablets?

　　9. D 10. A 11. C