题目

 The house is finished at last. All their hard work has ________.     A. paid back   B. paid up              C. paid off          D. paid for 答案：C从1985年起，城市改革全面展开，重点是（ ）A.乡镇企业改革 B.国有企业改革C.分配制度改革 D.私有企业改革