—What is the price of petrol these days? —Oh，it sharply since last month.
A. is raised
B. has risen
C. has arisen
D. is increased
网友回答
A. is raised
(答案→)B. has risen
C. has arisen
D. is increased
解析：考查时态。本题的关键词是后面的since last month,连词since要与现在完成时连用。动词rise上升，上涨；arise不是出现；句意：—这些日子汽油的价格怎么样？—自从上个月以来汽油涨得很快！根据句意说明B正确。