一、听对话，选择正确的答案。
() 1. Which one is the energy Binbin and Grandpa used to cook lunch outside?
A. Coal(煤). B. Solar power. C. Gas(天然气).
() 2. What did Grandpa say about the black paper?
A. It makes the box look nice.
B. It helps keep the heat.
C. It makes the food cook faster.
() 3. According to Robin, which of the following is NOT a use of sunlight?
A. Cooking food. B. Lighting houses. C. Making wind.
() 4. How did Binbin feel about cooking with the solar oven(烤炉)?
A. It was difficult and slow.
B. It was boring and cold.
C. It was super cool and fun.
() 5. What was Grandpa's advice at the end?
A. Use energy in smart ways.
B. Play outside every day.
C. Buy a new oven.

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