四、同学们正在谈论“绿色能源”项目。听一听，选择正确的答案。
（）1. What is their project about?
A. Saving water.
B. Science class.
C. Green energy.
（）2. How many types of green energy does Tina talk about?
A. Three.
B. Two.
C. One.
（）3. What does Tina say about green energy?
A. It is not clean.
B. It is clean.
C. It is very old.
（）4. How can they save energy at home?
A. Turn off lights.
B. Use LED lighting and take quick showers.
C. Watch more TV.
（）5. What do they want to put in their project?
A. Pictures of cars.
B. Green energy ideas.
C. Their homework.

1. C 2. A 3. B 4. B 5. B

五、“地球能源守护学院”在广播。听一听，将所缺信息补充完整。
When you 1. a room, use LED bulbs. They save energy. To 2. the room, pick an energy-saving fan or air conditioner that can 3. well. Remember, the 4. way to save energy is to use clean power. 5. energy, like coal, pollutes the air, while green energy keeps our Earth clean and healthy. Let’s make wise choices every day!

1. light 2. cool 3. run 4. top 5. Dirty