问题补充:
The price of the radio , and I don’t know the reason.
A. went up
B. has gone up
C. had gone up
D. will go up
答案:
A. went up
(答案→)B. has gone up
C. had gone up
D. will go up
解析:考查固定结构与时态相结合的应用。题意为:收音机的价格上涨了,我不知道其中的原因。go up 意为“上升,上涨,上扬”,从后句中的don’t know 可知降价与现在时态有关系,即对现在有影响。故选B。