《2025年通城学典组合训练八年级英语全一册人教版辽宁专版》

C
KEY→P14
范畴:人与自我 主题:身心健康 体裁:说明文 难度:★★★★ 建议用时:7分钟 评价:____/4
Do you play with your phone before bedtime? You may want to read a book instead. According to a study, looking at screens at night can cause us to sleep poorly.
In the evening, our brains secrete(分泌) melatonin(褪黑激素). Melatonin helps us feel sleepy and relaxed. It’s an important part of our sleep cycle. Our electronic screens stop that cycle from working normally.
Why? Because phones, computers and TVs produce blue light. Blue light stops our brains from secreting melatonin. Even just a little bit of blue light can have an effect(影响). Eight minutes of blue light can keep our brains “awake” for another hour. Even if we fall asleep, we may have lots of dreams. Our brains won’t have a good rest.
It will be even worse if we play an exciting game before bedtime. Games make our hearts beat faster, so we have a harder time falling asleep. Then, when we fall asleep, we don’t get enough “deep sleep”.
Use these tips to get a good night’s sleep.
• Have a relaxing routine every night. Take a warm shower or read a book.
• Sleep in a dark, quiet room that is not too warm or too cold.
• Count sheep. It’s the oldest trick, but it can actually work.
• Don’t eat a big meal or have caffeine. Instead, drink milk.
• Don’t exercise three hours before bedtime.
(B)1. Which of the following is TRUE about melatonin?
A. Too much of it makes us sleep poorly.
B. It can help us to fall asleep at night.
C. It makes us feel hungry and tired.
D. It stops our sleep cycle from going well.
(C)2. The underlined word “awake” in Paragraph 3 means “____” in English.
A. feeling nothing
B. having a rest
C. being sleepless
D. dreaming a lot
(C)3. What can we learn from Paragraph 4?
A. Playing games helps us go to sleep quickly.
B. Our hearts beat more slowly when we’re playing games.
C. Getting enough deep sleep is very important.
D. It’s good for us to play exciting games before bedtime.
(D)4. All these tips can help us get a good night’s sleep EXCEPT ____.
A. taking a warm shower
B. counting sheep
C. sleeping in a quiet room
D. eating a big meal

答案： 1.B 推理判断题。根据第二段中“Melatonin helps us feel sleepy and relaxed.”可知，褪黑激素能够帮助我们感到瞌睡和放松，从而让我们晚上更好地入睡。
2.C 词义猜测题。句意：八分钟的蓝光能够让我们的大脑再“清醒”一小时。根据句意以及“Our brains won’t have a good rest.”可知，大脑不能好好休息，说明它仍然醒着。此处awake意为“醒着的”，与being sleepless意思相近。
3.C 推理判断题。根据第四段中“Then, when we fall asleep, we don’t get enough ‘deep sleep’.”可推知，足够的深度睡眠是非常重要的。
4.D 细节理解题。根据“Don’t eat a big meal or have caffeine.”可知答案。