问题补充：
The sun is a huge, hot and bright star. It is important because without it there would be no life on the earth. The sun gives us light and heat.
All living things depend on the sun for their growth. Plants need light and heat to grow. They use the light from the sun to make food. But we human beings cannot make food by our own bodies from the sun. All the food we eat comes from plants in a food chain(链) . And the food chain starts with the sun . For example.
sun —→potatoes —→chips
sun —→corn —→hens —→eggs
sun—→wheat —→bread
Animals need sunlight, too. Just like us, their food comes from plants in food chain, which begins with the sun. For example,
Sun → leaf → caterpilllar(毛虫) → bird
Sun → seaweed(海藻) → small fish → whale(鲸)
With the help of sunlight, we can see things during the day. Even when the sky is cloudy, the sunlight is very strong and it shines through the clouds. If there was no sun, it would be dark all the time.
【小题1】The sun is a star.
A. huge, cold and bright B. huge, hot and bright C. small, warm and bright
【小题2】What are the two main things the sun gives us?
A. Light and heat. B. Heat and eggs. C. Corn and light.
【小题3】From the passage we learn that .
A. when the sky is cloudy, there is no sunlight at all
B. without the sun there will be no life on the earth
C. we human beings can make food by our own bodies
【小题4】All the food we eat comes from in a food chain. And the food chain stars with the .
A. plants; earth B. plants; sun C. animals; star
【小题5】Which is the best title (标题) for this passage?
A. Plants need heat and light to grow
B. All living things depend on the sun for their growth
C. The sun is very importantB
答案：
(答案→)B
解析：文章介绍给我们太阳的重要性，太阳给我们带来光明和热量，没有太阳就没有地球上的所有生物，所有的生物链都是以太阳起始的。
【小题1】细节理解题。根据原文The sun is a huge, hot and bright star.可知太阳是一个巨大，炎热，明亮的星球。故选B。
【小题2】细节理解题。根据原文The sun gives us light and heat.太阳给我们光和热量。故选A。
【小题3】细节理解题。根据原文It is important because without it there would be no life on the earth.可知没有太阳就没有地球上的生命。故选B。
【小题4】细节理解题。根据原文All the food we eat comes from plants in a food chain(链) . And the food chain starts with the sun .可知我们吃的所有食物都来自食物链里的植物，食物链都是以太阳开始的。故选B。
【小题5】细节理解题。通过阅读可知，本文讲述的是太阳的重要性。故选C。
