问题补充:
The project a success as the income of the company increases every year.
A. is proved
B. had proved
C. has proved
D. has been proved
答案:
A. is proved
B. had proved
(答案→)C. has proved
D. has been proved
解析: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。