《2025年学霸组合训练七年级英语上册译林版苏州专用》

( )1. What can we learn about melatonin?
C
( )2. Electronic screens can make us sleep badly because ______.
C
( )3. Which of the following would be the best title for the passage?
B

答案： 1. C 细节理解题。根据"In the evening, our bodies make melatonin. Melatonin makes us feel sleepy and relaxed. It is an important part of our sleep cycle."可知，褪黑激素帮助我们入睡，是睡眠周期的一个重要组成部分。故选 C。
2. C 细节理解题。根据"But the electronic screens stop that cycle from working as usual. 和"Why? Because phones, computers and TVs make blue light. Blue light stops our bodies from making melatonin."可知，电子屏幕发出的蓝光会破坏我们的睡眠周期，因为它阻止了褪黑激素的产生。故选 C。
3. B 标题归纳题。文章主要讨论了电子屏幕对睡眠的负面影响，并提供了改善睡眠的建议。因此，最合适的标题是"减少屏幕时间，睡个好觉"。故选 B。