Ⅳ. (2026常州勤业中学月考) 阅读理解（主题：人与自然·自然环境）
Rainforests cover only about 6% of the earth's surface, but they are home to over half of the world's plants and animals. Forests are called the "lungs" of the earth because they take in carbon dioxide and produce oxygen.
However, rainforests are in great danger. Every minute, about 20 hectares of rainforests are cut down. People cut them down for wood and farmland. This destroys animals' homes. Some species are dying out.
Rainforests are important for the climate too. They keep the earth's climate stable. When rainforests are cut down, the climate becomes warmer.
We must protect rainforests. We can buy products made from sustainable wood. We can also support organizations that protect rainforests.
()16. What percentage of the earth's surface do rainforests cover?
A. About 20%. B. About 6%. C. About 50%. D. About 10%.
()17. Why are forests called the "lungs" of the earth?
A. Because they have many plants and animals.
B. Because they take in carbon dioxide and produce oxygen.
C. Because they are very big.
D. Because they are in danger.
()18. Why do people cut down rainforests?
A. For wood and farmland. B. For animals.
C. For oxygen. D. For carbon dioxide.
()19. What happens when rainforests are cut down?
A. The climate becomes warmer. B. The climate becomes colder.
C. More animals live there. D. More plants grow there.
()20. What can we do to protect rainforests?
A. Buy sustainable wood products. B. Support rainforest protection organizations.
C. Both A and B. D. Cut down more trees.

Ⅴ. (2025 遂宁改编)阅读短文,在空白处填入一个适当的单词或括号内单词的正确形式
The Yellow River runs from the mountains to the sea. It gave birth to one of the 21. (old) and most famous cultures in the world—the Yellow River culture. In the hearts of 22. (China) people, the Yellow River is the mother river. It plays 23. important role in our country's development(发展).
The river got its name Huanghe in Chinese 24. its water is yellow. It takes lots of yellow sand to the water when it runs through the Loess Plateau(黄土高原).
The river starts 25. Qinghai Province in north-western China. It runs through a lot of places before 26. (run) into the Bohai Sea. The 5,464-kilometre-long river 27. (feed) about 12% of China's population and provides water for about 15% of fields and more than sixty 28. (city).
So far, our country has made great efforts in the environmental 29. (protect) of the river. Each year over 400 million tons of sand are prevented from being washed into it. Our mother river has become much 30. (clear) than before.