GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - 574MUH601VH07074X

Though dealers insist that professional art dealers can make money in the art market, even an (i)____________ knowledge is not enough: the art world is so fickle that stock-market prices are (ii)____________ by comparison. A. amateur's B. booming C. investor's D. erratic E. insider's F. predictable