《2025年中学生世界八年级英语上册沪教版五四制》

Ⅳ. Choose the best answer.
In a factory, water is very important. Factories use water to cool machines, clean things, and help in making products. After using water, factories make dirty water called wastewater.
This water needs to be cleaned. First, big pieces like plastic are taken out. Then, the water goes through filters. Some chemicals help clean the water more. After that, clean water is sent back to rivers.
Today, many factories try to save water. They use new machines to reuse water again and again. This helps protect our water. Some factories also use less water by changing how they work.
Engineers work hard. They do research to make better ways to clean water. Their job is to make sure dirty water does not hurt the Earth. People in the city also help. They raise awareness by sharing water - saving ideas. Together, factories and people can make a big change. Everyone should know: clean water is good for all.
( )1. Why do factories use water, according to the passage?
A. To give to workers.
B. To water gardens.
C. To cool machines and help make products.
D. To clean rivers.
( )2. What is the first step in cleaning factory wastewater?
A. Adding chemicals.
B. Sending it to homes.
C. Removing big pieces like plastic.
D. Using filters.
( )3. What does the word “wastewater” most likely mean?
A. Water used for cooking.
B. Water that is clean and ready to drink.
C. Water that has been used and is dirty.
D. Rainwater collected in tanks.
( )4. How do new machines in factories help save water?
A. By stopping all water use.
B. By using water only once.
C. By cleaning air.
D. By reusing water again and again.
( )5. Which of the following is NOT true according to the passage?
A. Engineers try to find better ways to clean water.
B. All factories already use no water at all.
C. Some factories change how they work to use less water.
D. People in cities help by raising awareness about water saving.
( )6. What is the main idea of the passage?
A. Factories should not use any water.
B. Everyone should drink more water.
C. Cleaning and saving water in factories is important for the Earth.
D. Plastic is the biggest problem in factories.

答案： 1. C 2. C 3. C 4. D 5. B 6. C