第18题: [单项选择]It was very difficult to build a power station in the deep valley, but it ______ as we had hoped. A. came off B. went off C. brought out D. made out 参考答案:A 答案解析:come off成功,奏效;go off爆炸,离去;bring out带出,引导出;make out分辨出,辨认出。该句中power station意为“能量站、电站”;valley意为“河谷、山谷”