题目

---Now more and more Chinese senior students are applying for admission to American universities through SAT. ---________. But taking an SAT may cost one more than 10,000 yuan. A. I hope so      B. Not really       C. That’s the case      D. That sounds reasonable 答案：C在生物体内含量极少，但对于维持生物体的正常生命活动必不可少的元素有A．Fe、Mn、Zn、Mg                       B．Zn、Cu、Mg、Ca C．Zn、Cu、B、Mn                       D．Mg、Mn、Cu、Mo