四、信息还原(10 分)
Do you often feel sleepy or less excited to go to school when it's raining? Scientists have found that rain can really make us sleepy. Here are the reasons.
First, when it rains, there isn't much sunlight. 1.
D
This makes our bodies produce something called melatonin (褪黑激素), which makes us sleepy.
Second, rain makes a soft and gentle sound called pink noise. When it rains, we hear the plop, plop, plop of raindrops hitting the windows. This sound can be like a lullaby (摇篮曲), 2.
B
.
Besides dark skies and pink noise, the humidity (湿度) that rain brings also plays a part. 3.
F
This means our lungs have to work harder, which can make us feel tired and sleepy.
Rain doesn't just make us sleepy. Some people feel sad during rainy weather or winter months when there's less sunlight. But don't worry. 4.
G
.
Now we have known rain can change how we feel. So, when it's
raining outside, 5.
C
. And when the sun is shining, enjoy the warmth and fun outside!

解析:
翻译:
### 四、信息还原(10分)
下雨的时候,你会不会经常觉得很困,或者对上学没那么兴奋?科学家发现,雨确实会让我们犯困。原因如下。
首先,下雨的时候,阳光不多。1. 这会让我们的身体产生一种叫做褪黑激素的物质,这种物质会让我们犯困。
其次,雨会产生一种柔和的声音,叫做粉红噪音。下雨的时候,我们会听到雨滴打在窗户上的“扑通、扑通、扑通”声。这种声音就像摇篮曲一样,2. 。
除了昏暗的天空和粉红噪音,雨带来的湿度也有影响。3. 这意味着我们的肺部需要更努力地工作,这会让我们感到疲惫和困倦。
雨不只会让我们犯困。有些人在雨天或者阳光较少的冬季会感到悲伤。但别担心。4. 。
现在我们已经知道雨会改变我们的情绪。所以,当外面下雨的时候,5. 。而当阳光明媚的时候,就去外面享受温暖和乐趣吧!