问题补充:
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
答案:
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。