四、信息还原
The weather is getting cooler; the trees are turning brown—It's autumn!
Why do leaves turn yellow?
In autumn, leaves go from green to orange, yellow and brown. A chemical called chlorophyll (叶绿素) plays a role. 1.
D
This feeds the trees and keeps the leaves green. But as autumn comes, the chlorophyll becomes less. The green colour goes away, and we can see the other colours.
2.
B
In autumn, apples are good for you and there are lots of other anti - inflammatory(抗炎的) foods to try as well, such as cabbage, garlic, peas and all kinds of lettuce.
Is it autumn or fall?
3.
E
Both of them were born in Britain. What exactly (确切地) you should call that season depends on where you are and whom you ask. In Great Britain, it usually has only one name: autumn. 4.
G
Do some outdoor activities!
Autumn is a perfect season, with comfortable temperatures for people to do some outdoor events. 5.
F
Just give yourself a break to enjoy nature.

解析:
翻译:
### 四、信息还原
天气越来越凉爽,树木渐渐变成褐色——秋天到了!
树叶为什么会变黄?
在秋天,树叶会从绿色变成橙色、黄色和褐色。一种叫做叶绿素的化学物质发挥着作用。1. 这种物质为树木提供养分并使树叶保持绿色。但随着秋天的来临,叶绿素变得越来越少。绿色褪去后,我们就能看到其他颜色了。
2.
在秋天,苹果对你有益,还有很多其他抗炎食物可供尝试,比如卷心菜、大蒜、豌豆和各种生菜。
是叫“autumn”还是“fall”?
3. 这两个词都起源于英国。你具体应该怎么称呼那个季节,取决于你在哪里以及你询问的对象。在英国,它通常只有一个名字:autumn。4.
做一些户外活动!
秋天是一个完美的季节,气温舒适,适合人们开展一些户外活动。5. 给自己放个假,去享受大自然吧。