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    精英家教网 > 高中英语 > 题目详情
    The project _______ a success as the income of the company increases every year. 
    A．is provedB．had provedC．has provedD．has been proved
    C
    考查时态。句意“那项计划已经被证明是一个成功，因为公司的收入每年都在增加。”叙述的是现在的情况，排除B；动作发生在过去，对现在造成的影响，用现在完成时。故选C。
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