-How much is the petrolper liter today? ---Oh 6.00 yuan. It sharply since last month.

问题补充：

---How much is the petrolper liter today?

---Oh, 6.00 yuan. It sharply since last month.

A. is raised

B. has arisen

C. has risen

D. is aroused

答案：

A. is raised

B. has arisen

(答案→)C. has risen

D. is aroused

解析：考查词义即时态。根据时间状语since last month，句子要用现在完成时态，排除A，D; rise上升，上涨；arise产生，出现。句子应是指价格上涨很快，所以选C。