Prices all the time and no one knows when they stable.
A. are going up; bee
B. have been going up; will bee
C. have gone up; will bee
D. have been gone up; bee
网友回答
A. are going up; bee
(答案→)B. have been going up; will bee
C. have gone up; will bee
D. have been gone up; bee
解析：考察时态。根据all the time一直可知第一空应该使用现在完成进行时。第二空是宾语从句，根据句意可知是将来时。句意：物价一直都在上涨。没有人知道什么时候会稳定下来。故B正确。