C
Have you ever looked closely at the paper money from different countries? You will see more than numbers and colours. You will discover pictures of rivers，mountains，buildings and famous people. 1. They are like small lessons in culture，history and nature. Paper money isn’t just for spending—it’s also for learning.
Let’s start with China. 2. On the 20 yuan note(纸币)，there is the Lijiang River in Guilin，with green mountains rising from calm waters. 3. On the 5 yuan note，you’ll find Mount Tai，one of the most famous mountains in China. A large number of poems were written in praise of it.
4. Switzerland’s notes include mountains，rivers，and even wind patterns! Canada’s notes have snowy landscapes and maple(枫树) leaves.
These days，many people use phones or cards as a way to pay. 5. But paper money still has its value—not only in money，but in meaning. You can hold it，look at it，and learn from it. It can be a tiny museum in your pocket. So next time you hold your paper money，take a second look.
A. It’s fast and easy. B. It’s a lesson worth learning.
C. Other countries do this too，in their own way.
D. It’s so beautiful that artists have painted it for centuries.
E. The Chinese note is a perfect mix of nature and tradition.
F. These pictures often show what each country finds important.

D
Cooking，the art and science of preparing food，is far more than daily housework. It’s like a fun classroom where you can learn different subjects all at once! 1.
Science is everywhere in cooking. When you make bread，the yeast(酵母) eats sugar and makes bubbles of gas. 2. When you cook meat and it turns brown and smells good，that’s cool Chemistry. Also，think about heating water，which shows how heat moves. It is all about Physics.
3. You need to follow the instructions when you mix materials，like “adding 1/4 spoons of salt”. Sometimes you have to make some changes to feed more or fewer people. That means doing Maths. Even buying the required materials with low cost teaches you Maths.
Food has a lot of history. Pasta didn’t start in Italy—it came from Asia long ago! Spices(香料) were once traded like gold，and this changed how countries talked to each other. 4. In hot places，people grow more different foods than in cold places. Learning about these things helps you understand how the world works.
Cooking is like a secret key that opens the door to learning many subjects. It’s not just about making yummy food. 5. Schools should teach cooking because it helps students see how everything in learning is connected!
A. Geography also matters. B. This is Biology in action. C. Maths helps a lot in the kitchen.
D. Cooking avoids wasting money. E. It’s also about becoming smarter in lots of ways.
F. The following will explain why cooking should be taught at school.