【正确答案】 A

【答案解析】as引导让步状语从句时，句子的倒装语序有三种形式。1）名词/副词+as+主语+谓语。如：Rich as he is, he is not happy. 2）名词（不加冠词）+as+主语+be 动词。如：Child as he is, he is mature. 3）实意动词+as+主语 +助动词。如:Try as she may, she still couldn't open the door.本题釆用的是第一种形式，因此谓语is应放在the energy of the sun 之后。