第4题: [单项选择]The French pianist who had been praised very highly ______ to be a great disappointment. A. turned off B. mined up C. turned out D. turned down 参考答案:C 答案解析:turn out“结果是”, “证明是”;turn off“关闭”;turn up“证明是”,等于mm out to be,但其本身不与to be连用,因此,不能入选;turn down“(能被)翻下