题目

The open university was started in order to help those who _____ having a university education when they were young. A. stopped    B. failed    C. missed    D. ceased 答案：C 解析: miss doing sth.没有做某事：I missed seeing the film when it was shown at school.(学校放映那部电影时，我没有能去看。) 在冶金工业上，均不能用通常化学还原剂制得的金属组是 [　　] A． Na、Mg、Al B． Na、K、Zn、Fe C． Zn、Fe、Cu、Ag D． Mg、Al、Zn、Fe