—I guess you can buy such a smart phone for 300 dollars.
—I could just two months ago，but the price by 20%.
A. went up
B. had gone up
C. has gone up
D. goes up
网友回答
A. went up
B. had gone up
(答案→)C. has gone up
D. goes up
解析：考查动词的时态。根据语境可知，此处是说该款智能手机到目前为止价格已上涨20%，因此用现在完成时。