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

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 raised

D. is increased

答案：

A. is raised

(答案→)B. has risen

C. has raised

D. is increased

解析：考查时态及语态，句意：这些天汽油的价格怎么样？噢，自从上个月已经迅速上涨了。根据语境，动作是从上个月持续到现在，所以用完成时态，可排除A和D，raise为及物动词，后面需要加宾语，所以选B。