It would be a state （ ）the middle class.
A、in the interest of B、under the control of C、for the sake of D、at the cost of 【正确答案】：B 【题目解析】：本题考查介词短语辨析。in the interest of“为了…的利益”， under the control of“在…控制之下”， for the sake of“为了……起见”， at the cost of“以…为代价”。句意：它将是一个在中间阶层控制下的国家。故选B。
