单选题 4.  The light from a firefly is said to be cold because the insect's utilization of the energy is so efficient that little of it ______ into heat.
【正确答案】 D
【答案解析】 本题考查so...that...句型,that后面应该是从句。原句意思是:据说萤火虫的光是冷的,因为该昆虫能够如此有效地利用能量,以至于几乎没有能量被转化为热量。