This year the price of rice about twenty percent.
A. was raised
B. has been risen for
C. has risen by
D. has raised to
网友回答
A. was raised
B. has been risen for
(答案→)C. has risen by
D. has raised to
解析：考查时态。句意：今年大米的价格已经上涨了百分之20.根据句意说明的是今年到现在以来所发生的情况，故使用现在完成时。Rise是一个不及物动词，没有被动语态的形式。故C正确。