--What is the price of petrol these days？-----Oh it sharply since last month. A. is

问题补充：

----- 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

答案：

A. is raised

(答案→)B. has risen

C. has arisen

D. is increased

解析：考查时态。Since引导的时间状语通常和现在完成时连用的。句意：自从上个月，汽油价格一直在上涨。