— What about the price of petrol now?
— It has been 20 percent since the beginning of this year.
A. increased to
B. risen by
C. increased by
D. risen to
网友回答
A. increased to
B. risen by
C. increased by
D. risen to
解析： increase ... by表示“增长了……”，要用被动语态，by表幅度；如果用rise，要用主动语态。