What's the article about lesson 27 in the fourth grade PEP Chinese volume 2 and in what order?

What's the article about lesson 27 in the fourth grade PEP Chinese volume 2 and in what order?

A deaf and dumb young man painted goldfish very carefully, with exquisite craftsmanship. It was written in the order of things

Why do the teenagers say: we are friends

Because the African country visited by the author is Zambia (mosiotunia falls is located in Zambia), China once aided the construction of the Tanzania Zambia railway in the 1970s, which left a good impression on the African people

What's one thing in Lesson 10 of the fourth grade Chinese textbook of PEP?
Be brief

How does the Yellow River change? The text introduces the process of the change of the Yellow River, the reasons for the change and the treatment plan. It tells people to protect the nature and the environment, or they will be punished by the nature. The text first describes the suffering of the people on both sides of the Yellow River, which is a disaster River, but it is also the Chinese nation