四、还原信息
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 in the world 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.
| A. Most people are very busy in autumn. | B. What are the special foods in autumn? |
| C. What do people usually wear in autumn? | D. Chlorophyll helps trees make sugar from sunlight. |
| E. The third season of the year has two names, autumn and fall. | F. Climb the mountains or bike down the roads in the countryside. |
| G. But if you go to the US, you'll find they use both words when talking about this season. |